Theorylytics

Billy - Starlight vs Yixuan

Billy - Starlight vs Yixuan — two Rupture agents competing for the same roster slot.

TL;DR — Quick Pick

Pick Billy - Starlight if…

  • You need a Physical Rupture agent and Billy - Starlight's kit matches your account gap.
  • You prefer Main DPS gameplay over Yixuan's Main DPS identity.
  • Billy - Starlight offers high-octane physical DPS with unique self-sustaining health mechanics and powerful EX Special Attack synergy.

Pick Yixuan if…

  • You need a Ether Rupture agent and Yixuan's kit matches your account gap.
  • You prefer Main DPS gameplay over Billy - Starlight's Main DPS identity.
  • Pull Yixuan if you need a premier Ether Rupture Main DPS.
Verdict

Billy - Starlight and Yixuan are both Rupture investments that answer different account needs. Billy - Starlight (Physical, Main DPS) shines when Billy - Starlight offers high-octane physical DPS with unique self-sustaining health mechanics and powerful EX Special Attack synergy. Yixuan (Ether, Main DPS) is the better commit when Pull Yixuan if you need a premier Ether Rupture Main DPS. Compare signature builds, team requirements, and your existing supports before pulling either.

At a Glance

Billy - Starlight
Stat
Yixuan
Physical
Attribute
Ether
Rupture
Specialty
Rupture
S-Rank
Rank
S-Rank
Main DPS
Primary role
Main DPS
Sheer Force / Rupture
Damage type
Sheer Force / Rupture
CRIT Rate
Scaling focus
CRIT Rate
Physical + Rupture
Playstyle clarity
Ether + Rupture
Strong
Self-sustain
Strong
ModerateWinner
Team flexibility
Focused
Dialyn / Lucia / Ju Fufu
Best support shell
Dialyn / Lucia / Ju Fufu
Cauldron of Clarity — A-rank · Accessible
F2P W-Engine path
Puzzle Sphere — A-rank craftable — strong CRIT DMG / EX Special option
Excellent
M0 viability
Excellent

Strengths & Weaknesses

Billy - Starlight

Strengths
  • Extensive invulnerability windows during signature moves [L83, L88, L103]
  • Integrated HP recovery mechanics within standard attack rotation [L78, L103]
  • High base Physical DMG output with RES shred capabilities [L17, L78]
Weaknesses
  • Requires careful HP management to maintain peak performance
  • High mechanical skill ceiling for optimal drift and counter-timing
  • Significant dependency on EX Special Attack usage [L22, L142]

Yixuan

Strengths
  • Top-tier on-field Rupture DPS with DEF-ignoring Sheer Force damage
  • HP scaling makes her naturally tanky while feeding personal damage
  • Dual Ultimate loop (Decibel + Technique Point) creates huge stun-window burst
Weaknesses
  • Demands heavy field time to bank Adrenaline and Technique Points before stun
  • Reliant on specific teammates (Rupture supports / off-field stunners) for peak output
  • PEN, DEF shred, and Energy Regen buffs do little — many generalist supports underperform

Shared Team Members

With Billy - Starlight

Opens stun windows so Billy - Starlight can dump burst damage safely.

With Yixuan

Opens stun windows so Yixuan can dump burst damage safely.

With Billy - Starlight

Buffs and enables Billy - Starlight with low field time and strong team utility.

With Yixuan

Buffs and enables Yixuan with low field time and strong team utility.

With Billy - Starlight

Opens stun windows so Billy - Starlight can dump burst damage safely.

With Yixuan

Opens stun windows so Yixuan can dump burst damage safely.

With Billy - Starlight

Defensive utility and supportive buffs that keep Billy - Starlight's rotation stable.

With Yixuan

Defensive utility and supportive buffs that keep Yixuan's rotation stable.

Best Builds (Signature)

Billy - Starlight

W-Engine

Starlight Rider Faceplate

Disk Set

Yunkui Tales

Disk 4

CRIT Rate% = CRIT DMG% = HP%

Disk 5

Physical DMG% > HP%

Disk 6

HP%

Substats

CRIT Rate >= CRIT DMG = ATK%

Yixuan

W-Engine

Qingming Birdcage

Disk Set

Yunkui Tales (4-PC)

Disk 4

CRIT Rate% / CRIT DMG%

Disk 5

Ether DMG% > HP%

Disk 6

HP%

Substats

CRIT Rate = CRIT DMG > HP% > ATK% > Flat HP

Who Should You Pull?

Billy - Starlight
Pull Billy - Starlight if…
  • You need a Physical Rupture agent and Billy - Starlight's kit matches your account gap.
  • You prefer Main DPS gameplay over Yixuan's Main DPS identity.
  • Billy - Starlight offers high-octane physical DPS with unique self-sustaining health mechanics and powerful EX Special Attack synergy.
  • He is an essential pull for players needing a versatile Physical Rupture attacker who excels in both sustained damage and survival.
  • Billy - Starlight is a stronger general pull priority (YES) for your roster.
Billy - Starlight Full Guide
Yixuan
Pull Yixuan if…
  • You need a Ether Rupture agent and Yixuan's kit matches your account gap.
  • You prefer Main DPS gameplay over Billy - Starlight's Main DPS identity.
  • Pull Yixuan if you need a premier Ether Rupture Main DPS.
  • She converts HP into Sheer Force, ignores enemy DEF, and clears endgame as an on-field hypercarry with strong self-survivability from Ultimate HP redistribution.
  • Yixuan is a stronger general pull priority (YES) for your roster.
Yixuan Full Guide