Billy Build Guide: W-Engine, Drive Discs & Teams | Zenless Zone Zero

Alexa Hunter

Mar 23, 2026

Billy Kid is a member of the Cunning Hares and a lively character in Zenless Zone Zero, easily recognizable with his dual pistols, flashy fighting style, and over-the-top personality. While he presents a fun, comedic character, he is also an extremely proficient fighter with the ability to consistently deliver ranged damage while keeping distance in the fight. In this blog, we will be covering Billy’s playstyle, his strengths, and his best builds, along with some information on W-Engines, Drive Discs, and team synergies to help you get the most out of him.

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Billy Agent Overview

Billy Information

Agent Information
	Rarity	A-Rank
	Attribute	Physical
	Specialty	Attack
	Faction	Cunning Hares
	Combat Role	DPS

Billy Overview

Billy is an A-Rank Physical Attack Agent and a member of the Cunning Hares whose role in combat is DPS. He is capable of attacking from long distances with his dual pistols, dealing consistent DMG while keeping a safe space between him and enemy attacks. Through repeated use of Basic Attack, he enters a state called Crouching Shot, in which he receives a tremendous 70% DMG increase for every attack performed while in the state. On top of that, Billy's Additional Core Ability boosts the following use of his Ultimate's DMG by 50% after he performs a Chain Attack, maxing out at 100% for 2 Chain Attacks. His playstyle revolves around maintaining the Crouching Shot state while making use of the advanced Double Chain technique, performed by cancelling the second chain prompt to activate Billy's Chain Attack twice, to maximise his DPS during enemy Stun windows.

Billy Skill Priority

Below are the best skill priorities for Billy:

Skill	Priority
Core Skill	★★★★★ (Top)
Basic Attack	★★★ (High)
Chain Attack	★★★★ (Top)
Special Attack	★★★★ (Top)
Dodge	★ (Low)
Assist	★ (Low)

Billy's Core Skill gives him a massive 70% DMG bonus when he enters Crouching Shot once fully upgraded, making it the top priority when upgrading his skills. His Chain Attack and Special Attack should be upgraded next because of their their strong impact on overall performance. Afterwards, Basic Attack should be upgraded, it offers solid benefits but not to the same extent as the top-priority skills. Finally, you can move to his Dodge and Assist skill, though bear in mind they have little impact on Billy's DPS.

Billy Best W-Engines

As an Attack character, Billy wants as much ATK, Crit Rate and Crit DMG as possible. Thanks to his simple kit, you're not required to reach any thresholds on his stats, thus opening up his W-Engine options by a considerable margin. His Signature W-Engine, Starlight Engine Replica, generally works best if you can utilize its passive. It's recommended you secure this W-Engine to maximise Billy's potential.

Best Choice
Starlight Engine Replica (A-Rank)	Base ATK: 624 Bonus Stat: ATK 25% W-Engine Effect (R5): Increases the equipper's Physical DMG by 57.5% for 8s upon hitting an enemy at least 6 meters away with a Basic Attack or Dash Attack.
Alternatives
Steel Cushion (S-Rank)	Base ATK: 684 Bonus Stat: Crit Rate 24% W-Engine Effect (R1): Increases Physical DMG by 20%. The equipper's DMG increases by 25% when attacking the enemy from behind.
Cordis Germina (S-Rank)	Base ATK: 713 Bonus Stat: Crit Rate 24% W-Engine Effect (R1): Increases CRIT Rate by 15%. When the equipper deals DMG with a Basic Attack or EX Special Attack, they gain 1 stack of a buff. Each stack increases the equipper's Electric DMG by 12.5%, up to 2 stacks. Each stack lasts 40s. The duration of each stack is calculated separately. Can trigger once per use of a skill. At 2 stacks, the wearer's Basic Attack and Ultimate DMG ignore 20% of enemy DEF.
The Brimstone (S-Rank)	Base ATK: 684 Bonus Stat: ATK 30% W-Engine Effect (R1): Upon hitting an enemy with a Basic Attack, Dash Attack, or Dodge Counter, the equipper's ATK increases by 3.5% for 8s, stacking up to 8 times. This effect can trigger once every 0.5s. The duration of each stack is calculated separately.
Heartstring Nocturne (S-Rank)	Base ATK: 713 Bonus Stat: Crit Rate 24% W-Engine Effect (R1): CRIT DMG increases by 50%. When the equipper enters the battlefield, or activates a Chain Attack or Ultimate, they gain 1 stack of Heartstring. Each stack of Heartstring allows the equipper's Chain Attack and Ultimate to ignore 12.5% of the target's Fire RES, stacking up to 2 times and lasting 30s. Repeated triggers reset the duration.
Starlight Engine (A-Rank)	Base ATK: 594 Bonus Stat: ATK 25% W-Engine Effect (R5): Launching a Dodge Counter or Quick Assist increases the equipper's ATK by 19.2% for 12s.
Marcato Desire (A-Rank)	Base ATK: 594 Bonus Stat: Crit Rate 20% W-Engine Effect (R5): When an EX Special Attack or Chain Attack hits an enemy, the equipper's ATK increases by 9.6% for 8s. While the target is under an Attribute Anomaly, this effect is increased by an additional 9.6%.

Billy Best Drive Disk Sets

Billy benefits the most from the Dawn's Bloom, Fanged Metal and Woodpecker Electro Drive Disk Set as a 4-piece choice. For his 2-piece choice, you can choose from Fanged Metal, Woodpecker Electro, Branch & Blade Song, Puffer Electro and Astral Voice depending on the stats he needs.

Best Choice
Dawn's Bloom	Damage dealt by Basic Attack is increased by 15%. (2-piece) Increases Basic Attack DMG by 20%. When equipped by an Attack character, using an EX Special Attack or Ultimate will further increase Basic Attack DMG by 20% for 25s. Repeated triggers reset the duration. (4-piece)
Fanged Metal	Increases Physical DMG by 10%. (2-piece) Whenever a squad member inflicts Assault on an enemy, the equipper deals 35% additional DMG to the target for 12s. (4-piece)
Woodpecker Electro	Increases CRIT Rate by 8%. (2-piece) Landing a critical hit on an enemy with a Basic Attack, Dodge Counter, or EX Special Attack increases the equipper's ATK by 9% for 6s. The buff duration for different skills are calculated separately. (4-piece)
2-piece Choice
Fanged Metal	Increases Physical DMG by 10%. (2-piece)
Woodpecker Electro	Increases CRIT Rate by 8%. (2-piece)
Branch & Blade Song	CRIT DMG +16%. (2-piece)
Puffer Electro	Increases PEN Ratio by 8%. (2-piece)
Astral Voice	ATK +10%. (2-piece)

Billy Best Drive Disk Stats

Here are the best Drive Disc main stats and sub-stats for Billy:

1. Drive Disc Main Stats

Main Stats	Drive Disk Slot
Crit DMG/Crit Rate	Slot 4
Physical DMG%/Pen Ratio%	Slot 5
ATK%	Slot 6

2. Drive Disc Sub Stats

Sub Stats	Priority
Crit Rate	★★★ (High)
Crit DMG	★★★ (High)
ATK%	★★★ (High)
Pen	★★ (Medium)
Flat ATK	★★ (Medium)

Billy Best Teams

Billy performs the best when he's paired with another Cunning Hares member or a Physical character, as that is when his Additional Core Ability is activated, increasing his Ultimate DMG up to 100% from 2 usages of Chain Attack

1. Billy Premium Team

Dialyn and Trigger are great teamates for Billy, they apply Daze quickly, provide amazing buffs and most importantly, require minimal field-time, making Billy shine on the battlefield. And when it comes to Support characters, Sunna and Astra Yao are undoubtedly two of the best for Attack characters in this meta, with their help, Billy's performance is significantly improved.

DPS

Support

Billy (A-Rank)

Dialyn (S-Rank)

Sunna (S-Rank)

Billy (A-Rank)

Trigger (S-Rank)

Sunna (S-Rank)

Billy (A-Rank)

Dialyn (S-Rank)

Astra Yao (S-Rank)

2. Billy Free To Play Team

Zhao and Nicole are easily the strongest free Supports in the game, with Zhao being able to activate Ether Veil and providing powerful buffs, and Nicole specialising in lowering enemies' DEF for more devastating attacks. Anby may not be the best Stun character due to her only focusing on applying Daze without providing buffs, but she still has a great synergy with Billy.

DPS

Support

Billy (A-Rank)

Zhao (S-Rank)

Nicole (A-Rank)

Billy (A-Rank)

Anby (A-Rank)

Nicole (A-Rank)

Billy Mindscape Cinema

M1: Dazzling Entrance

Rating: ★★★ (Good)
Effect: When Billy hits an enemy with a Dash Attack or Dodge Counter, he gains an additional 2.7 Energy. Can trigger once every 5s.
This Mindscape gives Billy a higher Energy generation rate in combat. However, due to the low bonus and the relatively high cooldown, its impact isn't too big.

M2: Roaming Gunslinger

Rating: ★★★★ (Great)
Effect: Billy's Dodge Counter DMG increases by 25%. Rolling Shots during his Basic Attacks count as dodges, making Billy Invulnerable during skill activation and able to trigger Perfect Dodges. When a Rolling Shot triggers a Perfect Dodge, it will automatically follow up a Dodge Counter.
Billy's Mindscape 2 completely transforms Billy's playstyle, as he would be to maintain his Crouching Shot state even while evading attacks thanks to the properties of a Dodge being given to his Rolling Shots. When played properly, you can stop worrying about having to re-enter the Crouching Shot state every dodge.

M3: Teachings of the Starlight Knights

Rating: ★ (Good)
Effect: Basic Attack, Assist, Dodge, Special Attack, and Chain Attack Lv. +2
This Mindscape only offers numerical skill level increases and a minimal increase in Billy's overall damage.

M4: Starlight Ballistics

Rating: ★★★ (Good)
Effect: When Billy hits an enemy with his EX Special Attack, the skill's CRIT Rate increases based on the distance from the enemy. The closer he is to the target, the greater the effect, up to a maximum increase of 32%.
Having an increased Crit Rate on Billy's heavy-hitting EX Special is really beneficial. However, Billy gets the most out of attacking from afar, so you would likely not be able to maximise its effect.

M5: Lost Technological Construct

Rating: ★ (Good)
Effect: Basic Attack, Assist, Dodge, Special Attack, and Chain Attack Lv. +2
Identical to Billy's Mindscape 3, only offering numerical skill level increases and a minimal increase in his overall damage.

M6: Starlight Hero

Rating: ★★★★★ (Best)
Effect: When Billy accumulates 10 hits on enemies or triggers a Perfect Dodge, his DMG increases by 6%, stacking up to 5 times. The effect resets is he is knocked back or launched by an enemy.
This Mindscape has the biggest impact on Billy's DPS, offering a massive 30% increase in DMG at 5 stacks with a relatively easy condition to trigger. Not only that, the effect lasts indefinitely provided you don't get hit from an enemy's heavy attack.

Conclusion

Overall, Billy is a great Attack Agent in Zenless Zone Zero. Though he might not be as powerful as newer DPS characters, when he's equipped with the right build and team setup, he can still get the job done. Besides, he's really fun to play. We hope this Billy guide can provide you with a better understanding of his strengths and help you maximize his potential.

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Billy Build Guide: W-Engine, Drive Discs & Teams | Zenless Zone Zero

Billy Agent Overview

Billy Information

Billy Overview

Billy Skill Priority

Billy Best W-Engines

Billy Best Drive Disk Sets

Billy Best Drive Disk Stats

1. Drive Disc Main Stats

2. Drive Disc Sub Stats

Billy Best Teams

1. Billy Premium Team

2. Billy Free To Play Team

Billy Mindscape Cinema

Conclusion