Honkai: Star RailBronyaBest build, teams and other guides

Best Light Cones

Best Light Cones

1

But the Battle Isn't Over(S1)

Increases the wearer's Energy Regeneration Rate by 10/12/14/16/18% and regenerates 1 Skill Point when the wearer uses their Ultimate on an ally. This effect can be triggered after every 2 uses of the wearer's Ultimate. When the wearer uses their Skill, the next ally taking action (except the wearer) deals 30/35/40/45/50% more DMG for 1 turn(s).

Source: Stellar Warp

A top option for characters that advance others via their skill, guaranteeing the DMG% boost of this Cone. Useful even on characters without the ability, thanks to the Energy Regen and skill point generation.

2

Past and Future(S5)

When the wearer uses their Skill, then the next ally taking action (except the wearer) deals 16/20/24/28/32% increased DMG for 1 turn(s).

Source: Echo of War  | Forgotten Hall Store  | Mission Reward

F2P option and alternative to But The Battle Isn't Over for characters that advance others via their Skill, guaranteeing the DMG% boost of this Cone.

Special Light Cones

Alternative or more specialized Light Cones that also are viable options for the character.

Dance! Dance! Dance!(S5)

When the wearer uses their Ultimate, all allies' actions are Advanced Forward by 16/18/20/22/24%

Source: Stellar Warp

Allows characters with high Speed and/or an accessible Ultimate to grant substantial action boosts to themselves and the team allowing for higher Speed (and cycle) breakpoints. Strongest on characters who can access their Ultimate at least once every 3 (but ideally 2) actions. Specifically strong when combined with other additional action advances or energy generation. When playing Bronya according to the -1 Speed build exercise caution when using this set bonus as it can ruin your Speed tuning unless carefully managed.

Best Relics

Best Relic Sets show the best sets that support the main character playstyle and work out of the box while the Special Relic Sets either are situational, support an alternative playstyle or are targeted toward min-maxers. The percentage numbers showcase the relative DPS increase when you take into account the set bonus only. For some characters there's no DPS (or its equivalent) available and in that case we listed the sets in the order of priority.

Best Relic Sets

1

Sacerdos' Relived Ordeal

(2)

Increases SPD by 6%.

(4)

When using Skill or Ultimate on one ally target, increases the ability target's CRIT DMG by 18%, lasting for 2 turn(s). This effect can stack up to 2 time(s).

Incredibly powerful set for characters with Ultimates and or Skills which target a single ally and who work well in teams with a sole damage dealer who can benefit from CRIT DMG.

2

Messenger Traversing Hackerspace

(2)

Increases SPD by 6%.

(4)

When the wearer uses their Ultimate on an ally, SPD for all allies increases by 12% for 1 turn(s). This effect cannot be stacked.

Flex

If you can't put together a top recommended 4P set with satisfactory sub/main stats, mix and match the 2P Bonuses from the following instead:

• 

  Sacerdos' Relived Ordeal
  [Speed +6%]
• Rainbow set - if you have great pieces with Speed from other sets, you can use them here.

Special Relic Sets

Messenger Traversing Hackerspace

(2)

Increases SPD by 6%.

(4)

When the wearer uses their Ultimate on an ally, SPD for all allies increases by 12% for 1 turn(s). This effect cannot be stacked.

Good team wide supportive option for characters with Ultimates which target allies. With this set equipped Ultimates are best timed carefully to ensure the Speed buff is active on key members for as long as possible. When playing Bronya according to the -1 Speed build exercise caution when using this set bonus as it can ruin your Speed tuning unless carefully managed (challenging).

Eagle of Twilight Line

(2)

Increases Wind DMG by 10%.

(4)

After the wearer uses Ultimate, their action is Advanced Forward by 25%.

Allows characters with accessible Ultimates to reach higher Speed (and cycle) breakpoints compared to just stacking Speed. Strongest on characters with powerful ultimate related effects or who can access their ultimate at least once every 3 (but ideally 2) actions. Particularly strong when combined with other action advancement effects. When playing Bronya according to the -1 Speed build exercise caution when using this set bonus as it can ruin your Speed tuning unless carefully managed (challenging).

Best Planetary Sets

1

Broken Keel

(2)

Increases the wearer's Effect RES by 10%. When the wearer's Effect RES is at 30% or higher, all allies' CRIT DMG increases by 10%.

An option for supports stacking Effect RES, while also increasing the entire team's CRIT DMG. Requires at least 30% Effect RES to activate.

The following Planars are all usable and have their own strength and weaknesses when looking for team-based supportive effects.

• 

  Fleet of the Ageless
  - Ideal for supporting teams that scale on ATK.
• 

  Penacony, Land of the Dreams
  - Top option for supporting teams with the same Element as the wearer, and for its Energy Regen.
• 

  Lushaka, the Sunken Seas
  - Top option for Supporting a single ATK-scaling DPS, and for its Energy Regen.

Special Planetary Sets

Sprightly Vonwacq

(2)

Increases the wearer's Energy Regeneration Rate by 5%. When the wearer's SPD reaches 120 or higher, the wearer's action is Advanced Forward by 40% immediately upon entering battle.

Incredibly potent option for buff/debuff based characters. The advance from this set allows the wearer to apply their buffs/debuffs before the rest of the team acts, accelerate rotations, allows access to ultimates closer to the start of the fight and also grants Energy Regen - a valuable stat for many supports.

Best Stats

Body

CRIT DMG

Feet

Speed

Planar Sphere

HP%

>

DEF%

Link Rope

Energy Regen Rate

Substats:

SPD (Until breakpoint) > CRIT DMG > HP = DEF > Effect RES% (30% If Keel)

Build comments

Can be played 2 ways, either Tune her SPD to be 1 below main DPS and spam Skill, or maximize her SPD to alternate between Basics and Skills to remain SP Neutral.

Recommended endgame stats

• HP: 3000 - 4000+

• DEF: 800 - 1100+

• SPD: 1-2 Speed slower than carry / 160+ (0 Speed Carry)

• ENERGY REGEN: 19.44%+

• CRIT DMG: 175 - 210%+

Traces priority

Skills priority:

Skill > Ultimate > Talent > Basic

Major Traces priority:

Command (A2) > Military Might (A6) > Battlefield (A4)

Sparkle vs Bronya vs Sunday

If you want to learn how Sparkle compares to Bronya and Sunday, check the Calculations tab for a very detailed analysis.

Below you can find a list of some of the stronger synergies between this character and others.

• 
  Bladebeing a DPS who rarely uses any Skill Points allows Bronya to always skill on him for maximizing DPS output, while also utilising all of her buffs, unlike other Harmonies who are always missing 1 or 2 buffs compared to Bronya.
• 
  Jingliuhas an awkward downtime after coming out of her Syzygy state, with a -1 Speed Bronya setup, you can skill with Jingliu into Bronya skilling her back up to go straight back into her Syzygy state and prolong her insane damage output.
• 
  Boothill biggest weakness is his ramp-up time from being Single Target and needing to get his Pocket Trickshots done asap to deal the most damage. Bronya alleviates the ramp-up time if built with -1 Speed to Boothill, and can allow for much quicker rotations, at the cost of additional Skill Point consumption.

The teams in the section are generated based on the current Memory of Chaos data we have gathered. If you want to see more statistics about the mode, check the MoC/PF/AS Statistics tab.

Rank 39

App. rate: 0.58%

Avg. cycles: 3.33

Rank 41

App. rate: 0.54%

Avg. cycles: 99.99

Rank 65

App. rate: 0.34%

Avg. cycles: 99.99

Rank 66

App. rate: 0.33%

Avg. cycles: 99.99

Rank 69

App. rate: 0.31%

Avg. cycles: 99.99

Rank 79

App. rate: 0.27%

Avg. cycles: 99.99

Rank 91

App. rate: 0.23%

Avg. cycles: 9.36

Rank 97

App. rate: 0.21%

Avg. cycles: 9

Rank 97

App. rate: 0.21%

Avg. cycles: 8

Rank 114

App. rate: 0.17%

Avg. cycles: 7.29

This section contains information about Bronya performance in the latest Memory of Chaos cycle (2.6), latest Pure Fiction (2.6) and the latest Apocalyptic Shadow (2.7), and the commonly used Relics and Cones in both modes. The page will be automatically updated every 2 weeks once enough data is gathered in the current cycle.

• For MoC, the last update happened on 29.11.2024 and the data below is based on 15955 accounts (7887 random we have scanned and 8068 self-reported). We have scanned 1m accounts in EU, NA and Asia regions and out of those, 4379 cleared MoC 12.
• For PF, the last update happened on 15.11.2024 and the data below is based on 2462 accounts (4270 random we have scanned and 8192 self-reported). We have scanned 1m accounts in EU, NA and Asia regions and out of those, 3073 cleared Pure Fiction 4.
• For AS, the last update happened on 13.12.2024 and the data below is based on 11457 accounts (3897 random we have scanned and 7560 self-reported). We have scanned 1m accounts in EU, NA and Asia regions and out of those, 2987 cleared Apocalyptic Shadow 4.

If you want to share your clear information with us, you simply need to fill the form below and provide us with your UID and make your Hoyo profile public - we will automatically parse the MoC/PF clear information from your profile after that!

Characters are ranked with appearance rate, which is how often a character was used in Memory of Chaos by the players who we have scanned, regardless of whether they own the character or not. Ownership rate currently cannot be obtained.

89.32%

83.73%

60.52%

57.72%

56.13%

53.48%

48.75%

44.32%

36.63%

26.4%

24.47%

23.54%

23.17%

22.41%

19.32%

19.09%

18.52%

17.2%

15.22%

9.1%

6.76%

6.6%

6.11%

5%

4.05%

3.2%

2.99%

2.33%

1.77%

1.64%

1.37%

1.28%

1.15%

1.14%

0.89%

0.73%

0.59%

0.57%

0.51%

0.37%

0.35%

0.34%

0.31%

0.18%

0.14%

0.1%

0.08%

0.04%

0.04%

0.04%

0.04%

0.03%

0.03%

0.02%

0.01%

0.01%

0%

0%

0%

0%

Characters are ranked with appearance rate, which is how often a character was used in Pure Fiction by the players who we have scanned, regardless of whether they own the character or not. Ownership rate currently cannot be obtained.

89.21%

72.45%

59.78%

58.04%

54.33%

46.2%

45.37%

44.38%

39.05%

37.81%

31.24%

30.65%

30.62%

23.22%

20.63%

15.88%

12.42%

10.96%

10.95%

9.72%

8.58%

7.36%

5.52%

4.72%

3.4%

3.13%

3.1%

2.99%

2.87%

2.52%

2.25%

1.64%

1.37%

1.23%

1.12%

1.06%

0.89%

0.87%

0.56%

0.48%

0.29%

0.26%

0.22%

0.12%

0.11%

0.08%

0.08%

0.08%

0.03%

0.02%

0.02%

0.01%

0.01%

0%

0%

0%

0%

0%

0%

0%

Characters are ranked with appearance rate, which is how often a character was used in Apocalyptic Shadow by the players who we have scanned, regardless of whether they own the character or not. Ownership rate currently cannot be obtained.

84.81%

77.26%

61.69%

60.14%

56.52%

56.18%

45.08%

35.63%

35.17%

30.53%

27.92%

24.34%

22.82%

22.13%

20.96%

14.64%

14.41%

14.08%

13.79%

13.28%

9.29%

9.07%

7.95%

6.48%

5.36%

3.82%

3.24%

2.55%

2.14%

2.12%

1.88%

1.73%

1.62%

1.58%

1.45%

1.23%

0.81%

0.79%

0.74%

0.73%

0.63%

0.61%

0.61%

0.51%

0.41%

0.41%

0.39%

0.19%

0.06%

0.04%

0.02%

0.02%

0.02%

0.01%

0.01%

0.01%

0%

0%

0%

0%

0%

This section lists the characters that were most commonly paired with Bronya in the current phase of Memory of Chaos.

43.35%

28.32%

26.3%

22.98%

22.98%

16.33%

16.18%

15.46%

This section lists the characters that were most commonly paired with Bronya in the current phase of Pure Fiction.

37.05%

23.61%

22.95%

16.72%

16.07%

15.08%

15.08%

14.43%

This section lists the characters that were most commonly paired with Bronya in the current phase of Apocalyptic Shadow.

33.62%

27.07%

26.03%

24.31%

21.21%

15.34%

14.83%

14.48%

Eidolons

Eidolons data comes from players we have scanned who used Bronya in the current MoC cycle (692), in the current PF cycle (305) or in the current AS cycle (580) and had the character placed in their Profile. Use the switcher below to show Bronya Eidolon performance in the endgame modes (Default MoC) - the percentage doesn't change as it takes into account all modes already.

Change mode:

MoC

PF

AS

7.23%

8.5 cyc.

Eidolon 0

18.05%

9.14 cyc.

Eidolon 1 - Hone Your Strength

Using Bronya's Skill has a 50% fixed chance of recovering 1 Skill Point. This effect has a 1 turn cooldown.

23.53%

8.33 cyc.

Eidolon 2 - Quick March

When using Skill, the target ally's SPD increases by 30% after taking action, lasting for 1 turn.

13.78%

8.25 cyc.

Eidolon 3 - Bombardment

Ultimate Lv. +2, up to a maximum of Lv. 15. Talent Lv. +2, up to a maximum of Lv. 15.

17.94%

9.5 cyc.

Eidolon 4 - Take by Surprise

After an ally uses Basic ATK on an enemy with Wind Weakness, Bronya immediately launches a follow-up attack on the target, dealing Wind DMG equal to 80% of Bronya's Basic ATK DMG. This effect can only be triggered 1 time per turn.

8.41%

8.25 cyc.

Eidolon 5 - Unstoppable

Skill Lv. +2, up to a maximum of Lv. 15. Basic ATK Lv. +1. up to a maximum of Lv. 10.

11.06%

99.99 cyc.

Eidolon 6 - Piercing Rainbow

The duration of the DMG Boost effect placed by the Skill on the target ally increases by 1 turn(s).

Light Cones

Light Cones are ranked with usage rate among the players we have scanned who used Bronya in the current MoC cycle (692), in the current PF cycle (305) or in the current AS cycle (580) and had the character placed in their Profile. Use the switcher below to show Bronya Light Cones performance in the endgame modes (Default MoC) - the percentage doesn't change as it takes into account all modes already.

Change mode:

MoC

PF

AS

70.21%

8.61 cyc.

But the Battle Isn't Over

Increases the wearer's Energy Regeneration Rate by 10/12/14/16/18% and regenerates 1 Skill Point when the wearer uses their Ultimate on an ally. This effect can be triggered after every 2 uses of the wearer's Ultimate. When the wearer uses their Skill, the next ally taking action (except the wearer) deals 30/35/40/45/50% more DMG for 1 turn(s).

Source: Stellar Warp

10.6%

10 cyc.

Past and Future

When the wearer uses their Skill, then the next ally taking action (except the wearer) deals 16/20/24/28/32% increased DMG for 1 turn(s).

Source: Echo of War  | Forgotten Hall Store  | Mission Reward

8.34%

9 cyc.

Dance! Dance! Dance!

When the wearer uses their Ultimate, all allies' actions are Advanced Forward by 16/18/20/22/24%

Source: Stellar Warp

3.86%

99.99 cyc.

A Grounded Ascent

After the wearer uses Skill or Ultimate on one ally character, the wearer regenerates 6/6.5/7/7.5/8 Energy and the ability's target receives 1 stack of "Hymn" for 3 turn(s), stacking up to 3 time(s). Each stack of "Hymn" increases its holder's DMG dealt by 15/17.25/19.5/21.75/24%. After every 2 instance(s) of Skill or Ultimate the wearer uses on one ally character, recovers 1 Skill Point.

Source: Event Warp (limited)

1.35%

8 cyc.

Planetary Rendezvous

Upon battle entry, if an ally deals the same DMG Type as the wearer, DMG dealt increases by 12/15/18/21/24%.

Source: Stellar Warp

1.13%

99.99 cyc.

Past Self in Mirror

Increases the wearer's Break Effect by 60/70/80/90/100%. After the wearer uses their Ultimate, increases all allies' DMG by 24/28/32/36/40%, lasting for 3 turns. Should the wearer's Break Effect exceed or equal 150%, 1 Skill Point will be recovered. At the start of each wave, immediately regenerates 10/12.5/15/17.5/20 Energy for all allies. Effects of the same type cannot stack.

Source: Event Warp (limited)

0.96%

99.99 cyc.

Meshing Cogs

After the wearer uses attacks or gets hit, additionally regenerates 4/5/6/7/8 Energy. This effect can only be triggered 1 time per turn.

Source: Stellar Warp

0.93%

99.99 cyc.

Memories of the Past

Increases the wearer's Break Effect by 28/35/42/49/56%. When the wearer attacks, additionally regenerates 4/5/6/7/8 Energy. This effect can only be triggered 1 time per turn.

Source: Stellar Warp

0.72%

99.99 cyc.

Poised to Bloom

Increases the wearer's ATK by 16/20/24/28/32%. Upon entering battle, if two or more characters follow the same Path, then these characters' CRIT DMG increases by 16/20/24/28/32%. Abilities of the same type cannot stack.

Source: Event Warp (limited)

0.41%

99.99 cyc.

For Tomorrow's Journey

Increases the wearer's ATK by 16/20/24/28/32%. After the wearer uses their Ultimate, increases their DMG dealt by 18/21/24/27/30%, lasting for 1 turn.

Source: Mission Reward

Relic Sets

Relic Sets are ranked with usage rate among the players we have scanned who used Bronya in the current MoC cycle (692), in the current PF cycle (305) or in the current AS cycle (580) and had the character placed in their Profile. The results are limited to top 5 combinations. Flex means 2 random Relic pieces that don't combine into a Set.

Relic Sets

27.25%

Messenger Traversing Hackerspace

(2)

Increases SPD by 6%.

(4)

When the wearer uses their Ultimate on an ally, SPD for all allies increases by 12% for 1 turn(s). This effect cannot be stacked.

19.27%

Sacerdos' Relived Ordeal

(2)

Increases SPD by 6%.

(4)

When using Skill or Ultimate on one ally target, increases the ability target's CRIT DMG by 18%, lasting for 2 turn(s). This effect can stack up to 2 time(s).

15.54%

Messenger Traversing Hackerspace

(2)

Increases SPD by 6%.

(4)

When the wearer uses their Ultimate on an ally, SPD for all allies increases by 12% for 1 turn(s). This effect cannot be stacked.

Flex

9.92%

Messenger Traversing Hackerspace

(2)

Increases SPD by 6%.

(4)

When the wearer uses their Ultimate on an ally, SPD for all allies increases by 12% for 1 turn(s). This effect cannot be stacked.

Messenger Traversing Hackerspace

(2)

Increases SPD by 6%.

(4)

When the wearer uses their Ultimate on an ally, SPD for all allies increases by 12% for 1 turn(s). This effect cannot be stacked.

5.48%

Eagle of Twilight Line

(2)

Increases Wind DMG by 10%.

(4)

After the wearer uses Ultimate, their action is Advanced Forward by 25%.

Planetary Sets

61.45%

Broken Keel

(2)

Increases the wearer's Effect RES by 10%. When the wearer's Effect RES is at 30% or higher, all allies' CRIT DMG increases by 10%.

11.37%

Sprightly Vonwacq

(2)

Increases the wearer's Energy Regeneration Rate by 5%. When the wearer's SPD reaches 120 or higher, the wearer's action is Advanced Forward by 40% immediately upon entering battle.

7.76%

Lushaka, the Sunken Seas

(2)

Increases the wearer's Energy Regeneration Rate by 5%. If the wearer is not the first character in the team lineup, then increase the ATK of the first character in the team lineup by 12%.

7.04%

Penacony, Land of the Dreams

(2)

Increases wearer's Energy Regeneration Rate by 5%. Increases DMG for all other allies with the same DMG Type as the wearer by 10%.

4.07%

Forge of the Kalpagni Lantern

(2)

Increase the wearer's SPD by 6%. When the wearer hits enemy targets with Fire Weakness, the wearer's Break Effect increases by 40%, lasting for 1 turn(s).

Relic Stats

Relic Stats are shown based on the Relics used by the players we have scanned who used Bronya in the current MoC cycle (692), in the current PF cycle (305) or in the current AS cycle (580) and had the character placed in their Profile.

Main stats

Body

CRIT DMG

- 91.04%

HP

- 3.63%

DEF

- 3.06%

Feet

Speed

- 97.63%

DEF

- 0.51%

ATK

- 0.41%

Planar Sphere

HP

- 47.17%

DEF

- 27.23%

Wind DMG

- 9.52%

Link Rope

Energy Regen Rate

- 93.65%

HP

- 2.92%

ATK

- 1.89%

Average stats

Average stats

HP

- 4046.57

ATK

- 1676.42

DEF

- 1363.19

Speed

- 149.19

CRIT Rate

- 11.8%

CRIT DMG

- 187.31%

Wind DMG

- 20.71%

Energy Regen Rate

- 27.2%

Effect RES

- 33.82%

Effect HIT Rate

- 9.3%

Break Effect

- 12.43%

Average sub stats

Average sub stats

HP

- 14.16%

ATK

- 12.61%

DEF

- 18.94%

Speed

- 19.91

CRIT Rate

- 6.79%

CRIT DMG

- 51.04%

Effect RES

- 17.72%

Effect HIT Rate

- 9.3%

Break Effect

- 13.48%

Other stats

Average stats

Character level - 79.9

Light Cone level - 79.05

Basic level - 4.48

Skill level - 10.23

Ultimate level - 10.72

Talent level - 9.84

Foreword

In this guide we’ll briefly offer a comparison between Sunday, Bronya and Sparkle to highlight their benefits and shortcomings. Light Cones are not included in this evaluation and can add further boosts to each character, but we have added a section at the end that gives additional information about the LC impact.

• All characters have 220% CRIT DMG.
• All characters are E0.
• Bronya is the -1 Speed variant.
• Sunday is the -1 Speed variant.
• Sparkle is the Hyperspeed variant.

Buffs

Sunday buffs

Skill:

• Action Advance: 100%
• DMG%: 30% (2 turns)
• Summon DMG%: 50% (2 turns)

Ultimate:

• Energy: +40
• CRIT DMG%: 78% (3 turns)

Passive:

• CRIT Rate%: 20%

SP Economy: SP Neutral (Assumes you get hit once every 3 actions to get the missing energy)

Bronya Buffs

Skill:

• Action Advance: 100%
• DMG%: 66% (1 turn)

Ultimate:

• ATK%: 55% (2 turns)
• CRIT DMG%: 55% (2 turns)

Passive:

• DMG%: 10%

SP Economy: SP Negative

Sparkle buffs

Skill:

• Action Advance: 50%
• CRIT DMG%: 98% (1.5 turn)

Ultimate:

• DMG%: 30% (2 turns)

Passive:

• ATK%: 15%
• Mono Quantum ATK%: 15%
• DMG%: 18%

SP Economy: SP Positive (Slightly)

Advance

When it comes to Advance, Sunday’s is the most powerful and the clear winner but only if you’re playing him in a summoner team. Outside of summoner teams his Advance is identical in power to Bronya’s with Sparkle’s being the weakest. Sunday and Bronya are both effective in the -1 and Hyperspeed playstyles but Sparkle is more limited to the Hyperspeed playstyle due to her weaker advance.

• 
  Sunday - 100% +100% summon
• 
  Bronya - 100%
• 
  Sparkle - 50%

Crit DMG

Sparkle and Sunday both have strong CRIT DMG buffs they can keep active at all times on their carry with Sparkle having a slight edge in most cases. Bronya’s CRIT DMG boost is weaker and has poor uptime due to its 2 turn duration, being tied to her allies turns and triggering from her Ultimate. Sunday does not have this issue as his Ultimate is based on his own turns with a longer duration.

• 
  Sunday - 78% (Perma uptime)
• 
  Bronya - 55% (Poor uptime)
• 
  Sparkle - 98% (Perma uptime)

Crit Rate

Sunday is the only one of the three with a CRIT RATE buff and it’s a massive one applying in any team. This buff more than makes up for his lack of ATK% buffs and for most characters is even preferable.

• 
  Sunday - 20% (Perma uptime)
• 
  Bronya - 0%
• 
  Sparkle - 0%

DMG%

Bronya has the strongest DMG% boost but it isn’t always fully active due to her Skill's 1 turn duration clashing with her -1 Speed playstyle, resulting in half the carries attacks being unbuffed. Sparkle can maintain her buff by Ulting the carry on their turn and Sunday’s buff lasts 3 turns, ensuring it’s always active. Bronya is most powerful if you can align powerful cooldowns during her short window, Sparkle is most consistent and Sunday has the weakest DMG% outside of summoner teams in which he smashes everyone.

• 
  Sunday - 30% (80% including Summon) (Perma uptime)
• 
  Bronya - 66% (Half uptime or Less) + 10% (Perma uptime)
• 
  Sparkle - 48% (Perma uptime)

ATK%

Similar to her CRIT DMG% buff, Bronya’s ATK% buff suffers the same fate, being tied to her Ultimate which results in poor uptime. Sparkle provides a weak ATK% buff in rainbow teams but a much stronger one in Mono Quantum teams. Sunday has no ATK% buff but more than makes up for this in other areas.

• 
  Sunday - 0%
• 
  Bronya - 55% (Poor Uptime)
• 
  Sparkle - 15% (Perma uptime) + 30% Mono Quantum Only (Perma uptime)

Energy Regen

Also unique to Sunday is his Energy Regen, adding even more value to his kit where he was already competing nicely.

• 
  Sunday - 40 (Every 3 actions)
• 
  Bronya - 0
• 
  Sparkle - 0

Skill Points

Perhaps most important part of the comparison. Sparkle is slightly SP Positive, but offset by the fact she can’t fully play within the -1 playstyle to take advantage of it due to her 50% Advance. Bronya is very SP negative making the -1 playstyle challenging but doable in a limited amount of teams. Sunday is fully capable of the -1 playstyle and is SP neutral (assuming Sunday gets hit once every 3 actions to get the missing energy - which in the current AoE heavy meta, will happen even more often), unlocking the playstyle for vastly more teams than Bronya allowed.

• 
  Sunday - SP Neutral
• 
  Bronya - SP Negative
• 
  Sparkle - SP Positive (Slightly)

Comparison

• 
  Sunday vs
  
  Bronya - Sunday is the clear winner, offering many of the same things as Bronya on top of some absurdly potent extras, all while consuming no Skill Points compared to her (Bronya is the Skill Point abyss).
• It must be noted that as a standard character, pulling Bronya’s Eidolons is only a matter of time for long time players. With them, Bronya can regain some ground but Sunday’s advantage is that big, that he wont be overcome in all but the most specific situations.
• 
  Sunday vs
  
  Sparkle - In teams that prefer a Hyperspeed advancement, Sparkle can more or less hold her own against Sunday. Sparkle also provides very different access to Skill Points, offering plenty SP up-front, but consuming them herself - compared to Sunday who offers none and essentially uses none (without his Signature). This can be valuable for teams that need Skill Points at the start of fights. While Sparkle has places where she thrives, Sunday without a doubt holds the top spot in more teams - he is the clear winner in any summoner team, energy hungry team or team who wants to take advantage of the -1 playstyle.

Signatures

When considering each character with their signature Light Cones, all of them gain a boost to their capabilities. Here are the changes they make - if you have access to these make sure to factor them into your evaluation of the characters.

• 
  Sunday - Adds a 45% DMG boost to Sunday’s carry permanently and also offers him a constant stream of Skill Points as he uses his Skill and Ultimate. This Cone allows Sunday to match Sparkle’s status as Skill Point positive, improving his flexibility further while also bolstering his DMG% bonuses which outside of summoner teams is low.
• 
  Bronya - Softens Bronya’s Skill Point requirements slightly and adds a further 30% DMG boost to her skill, boosting it from 66% to 96%. This Cone helps make SP more manageable and bolsters her buffs but doesn’t help with her uptime or bringing her any closer to her competition - as a standard Cone her competition can also use it to great effect.
• 
  Sparkle - Grants the wearer 32% CRIT DMG boosting their scaling abilities and offers the entire team a permanent 10% CRIT RATE and 28% CRIT DMG boost. With her Signature equipped, Sparkle’s CRIT buffing capabilities are seriously amped up giving her by far the most CRIT DMG and a bit of CRIT RATE to gain some ground on Sunday.

TL;DR

Who is better between the three comes down to the damage dealer of your choice and the specific setup you're using, but in most cases, Sunday will be the primary choice in Hypercarry teams moving forward - with or without his Signature, but without you will have to rely on getting hit from time to time to achieve the 3-turn rotation.