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Starlight Billy full body splash art — Zenless Zone Zero Physical Stun agent
Cunning Hares

Cunning Hares

Starlight Billy

S-Rank
Physical
Stun
RoleS-Rank Physical StunBest W-EngineStarlight Rider FaceplateDrive DiscYunkui Tales 4pcTop substatCRIT RATE
1

Best W-Engines

SS
BiSStarlight Rider FaceplateS1

Billy's signature is his best option by a wide margin, all the more valuable because Rupture Agents have few good alternatives. HP% mainstat, unconditional CRIT Rate and a stacking Sheer DMG buff give him exactly what he needs.

Usage 82.04%Shiyu 30678DA 29136
100%
Qingming BirdcageS
AltQingming BirdcageS1

Yixuan's signature is a straightforward stat stick for Billy. Its high base ATK matters little for Rupture scaling, but 20% unconditional CRIT Rate is very valuable given how heavily loaded he already is on CRIT DMG.

Usage 2.49%Shiyu 32346DA 26785
86.54%
Cauldron of ClarityA
BudgetCauldron of ClarityS5

The best A-rank for Billy by a wide margin: HP% mainstat, a useful mix of buffs, and full uptime that he maintains effortlessly. It lands barely behind limited picks such as Qingming Birdcage.

Usage 12.15%Shiyu 28141DA 25374
84.1%
Steel CushionS
AltSteel CushionS1

Although designed for Attackers, this Standard S-rank brings a CRIT Rate mainstat, and that alone puts it above most A-rank choices for Billy.

Usage 0.38%Shiyu 30055DA 22278
80.97%
Grill O'WispA
BudgetGrill O'WispS5

Billy can drain his own HP with Drive Suppression, but rarely does so mid-combo. Doing it before every Adrenaline EX is possible, yet his long animations would push attacks past the stun window, effectively trading CRIT Rate for Stun DMG Multiplier. Assumed at 50% uptime; most of its value comes from the HP% mainstat.

Usage 0.76%Shiyu 27023DA 22304
80.31%

Percentages are full-team damage calculations relative to the best W-Engine at S1 (100%) — team used: Dialyn (Yesterday Calls) + Lucia (Dreamlit Hearth). Calc data via Prydwen, 2026-08-23.

2

Best Drive Discs

4-Piece

1
Yunkui Tales
4pc

Yunkui Tales

2-Piece

Woodpecker Electro
2pc

Woodpecker Electro

Branch & Blade Song
2pc

Branch & Blade Song

Fanged Metal
2pc

Fanged Metal

Astral Voice
2pc

Astral Voice

Bunny in Wonderland
2pc

Bunny in Wonderland

3

Main Stats

Disc 44
CRIT Rate% = CRIT DMG% = HP%

CRIT Rate% = CRIT DMG% = HP%

Disc 55
Physical DMG% > HP%

Physical DMG% > HP%

Disc 66
HP%

HP%

4

Substat Priority

#1
CRIT RATE

CRIT RATE

#2
CRIT DMG

CRIT DMG

#3
HP%

HP%

#4
Flat HP

Flat HP

#5
Flat ATK

Flat ATK

5

Skill Priority

1
Chain Attack

Chain Attack

2
Special Attack

Special Attack

3
Basic Attack

Basic Attack

4
Assist

Assist

5
Dodge

Dodge

6

Best Teams

Prydwen T0.5 (Crit DPS) — Aug 2026

Skills

Press the Basic Attack button to activate. Performs up to four attacks forward, dealing Physical DMG. During the 4th hit, press the Special Attack button to use Special Attack: Drive Suppression with 50% reduced HP consumption. Restores a small amount of HP on hit.

PhysicalHP RecoveryCombo Preservation
Mindscape Cinema

Mindscape Cinema

— click to explore

Heroic Entrance

Core Passive: Knight's Resolve restores an additional 60 Adrenaline upon entering the battlefield. Hitting an enemy with an EX Special Attack causes Starlight - Billy's DMG to ignore 18% Physical RES for 45s (repeated triggers refresh).

Skill Upgrade Priority

1Chain AttackChain AttackPriority
2Special AttackSpecial Attack
3Basic AttackBasic Attack
4AssistAssist
5DodgeDodge

Advancement Materials

Coming Soon

Material costs & farming routes

Skill Materials

Coming Soon

Material costs & farming routes