Theorylytics

Billy vs Pyrois

Billy vs Pyrois — two Attack agents competing for the same roster slot.

TL;DR — Quick Pick

Pick Billy if…

  • You need a Physical Attack agent and Billy's kit matches your account gap.
  • You prefer DPS gameplay over Pyrois's Main DPS identity.
  • Billy is a solid, accessible Physical attacker who excels at mid-to-long-range sustained damage.

Pick Pyrois if…

  • You need a Ether Attack agent and Pyrois's kit matches your account gap.
  • You prefer Main DPS gameplay over Billy's DPS identity.
  • Pyrois acts as a premier Ether main DPS capable of massive bursts and stun manipulation.
Verdict

Billy and Pyrois are both Attack investments that answer different account needs. Billy (Physical, DPS) shines when Billy is a solid, accessible Physical attacker who excels at mid-to-long-range sustained damage. Pyrois (Ether, Main DPS) is the better commit when Pyrois acts as a premier Ether main DPS capable of massive bursts and stun manipulation. Compare signature builds, team requirements, and your existing supports before pulling either.

At a Glance

Billy
Stat
Pyrois
Physical
Attribute
Ether
Attack
Specialty
Attack
A-Rank
Rank
S-RankWinner
DPS
Primary role
Main DPS
Direct Attack
Damage type
Direct Attack
CRIT Rate
Scaling focus
CRIT Rate
Physical + Ranged DPS
Playstyle clarity
Ether + AttackerWinner
Strong
Self-sustain
Strong
ModerateWinner
Team flexibility
Focused
Dialyn / Sunna / Anby
Best support shell
Dialyn / Astra Yao / Sunna
Steel Cushion(S1) — S-rank · Accessible
F2P W-Engine path
Sol Exuvia(S5) — S-rank · Accessible
Good
M0 viability
ExcellentWinner

Strengths & Weaknesses

Billy

Strengths
  • Safe mid-to-long-range attack distance
  • High AoE damage potential with piercing shots
  • Increased damage output while in Crouching Shot
Weaknesses
  • Stationary playstyle leaves him vulnerable to knockback
  • Core passive damage buff lost if repositioning incorrectly
  • Requires proper team synergy to maximize Ultimate potential

Pyrois

Strengths
  • High base damage scaling on Ether attacks
  • Access to multiple utility-focused Ultimate branches
  • Strong invulnerability frames during signature combos
Weaknesses
  • Dependent on Solar Prominence management
  • Rotationally complex for optimal performance
  • Vulnerable during startup of specific animations

Shared Team Members

With Billy

Builds Daze so Billy can capitalize on stun windows.

With Pyrois

Opens stun windows so Pyrois can dump burst damage safely.

With Billy

Buffs and enables Billy with strong team utility.

With Pyrois

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

Best Builds (Signature)

Billy

W-Engine

The Brimstone(S5)

Disk Set

Woodpecker Electro(4-PC)

Disk 4

CRIT Rate%

Disk 5

Physical DMG%

Disk 6

ATK%

Substats

CRIT Rate >= CRIT DMG = ATK%

Pyrois

W-Engine

Sol Exuvia(S5)

Disk Set

The Sky Ablaze (4-PC)

Disk 4

CRIT Rate% > CRIT DMG%

Disk 5

PEN Ratio% > Ether DMG% > ATK%

Disk 6

ATK%

Substats

CRIT Rate >= CRIT DMG = ATK%

Who Should You Pull?

Billy
Pull Billy if…
  • You need a Physical Attack agent and Billy's kit matches your account gap.
  • You prefer DPS gameplay over Pyrois's Main DPS identity.
  • Billy is a solid, accessible Physical attacker who excels at mid-to-long-range sustained damage.
  • He is a great investment for new players needing a reliable main DPS before pulling for high-tier limited units.
  • Safe mid-to-long-range attack distance.
Billy Full Guide
Pyrois
Pull Pyrois if…
  • You need a Ether Attack agent and Pyrois's kit matches your account gap.
  • You prefer Main DPS gameplay over Billy's DPS identity.
  • Pyrois acts as a premier Ether main DPS capable of massive bursts and stun manipulation.
  • Their unique ability to cycle through multiple Ultimate branches makes them incredibly flexible for various combat encounters.
  • Pyrois is a stronger general pull priority (YES) for your roster.
Pyrois Full Guide