Starlight - Billy
An on-field Physical Rupture main DPS who uses Sheer Force scaling off Max HP, ignores DEF, and spends HP to charge Determination before unleashing his Full-Throttle Starlight finisher.
Tier S · Rupture · Physical. BiS: Starlight Rider Faceplate. An on-field Physical Rupture main DPS who uses Sheer Force scaling off Max HP, ignores DEF, and spends HP to charge Determination before unleashing his Full-Throttle Starlight finisher.
Best W-Engines
Billy's HP/Determination kit — the strongest, no debate.
Recommended Drive Discs
Yunkui Tales scales HP + CRIT Rate + Sheer DMG right into Billy's mechanics, 2pc 
Fanged Metal adds Physical DMG.
Branch & Blade Song when you need extra CRIT/ATK for the finisher rotation.4: CRIT Rate / CRIT DMG · 5: HP% (or Physical DMG) · 6: HP%
Prioritize CRIT Rate > CRIT DMG > HP% > ATK%; HP is the source of Sheer Force, so don't skip it.
Skill priority: Core Skill > Special Attack > Basic Attack > Chain > Assist > Dodge.
Worth pulling if you like on-field Rupture burst and own 
Lucia — Billy converts HP into Sheer Force and ignores DEF, giving a high damage ceiling. Downsides: as a Rupture unit most ordinary buffs do NOT apply to him, so he needs dedicated Rupture supports (Lucia/
Pan Yinhu) to reach full power; without the right support type he visibly falls off. This guide is still new, so numbers may be adjusted.
Battle-start targets (gamewith's table): HP ~19,200 / Crit Rate ~67% / Crit DMG ~98%. The key point: HP IS his damage — each point of Max HP makes 0.1 Sheer Force, and Sheer Force is the multiplier for all his Sheer DMG (true damage that ignores DEF), so stack HP even ahead of CRIT. With his signature Starlight Rider Faceplate (+20% CR) plus 4pc Yunkui Tales (+12% CR), Crit Rate reaches ~99% almost for free (per gamewith), freeing substats for HP% and Crit DMG. Substat priority: Crit Rate > HP% > Crit DMG > ATK. Main stats: slot 4 Crit Rate/Crit DMG · slot 5 HP% (or Physical DMG) · slot 6 HP%. Mechanic note: EX Special (Drive Suppression) requires HP above 25% to fire, so don't let HP drop too low.
1) OPENER: enter with 60 Adrenaline ready (Core Passive Knight's Resolve), press Special (Drive Suppression) to turn on the Crit DMG buff and start building Determination. 2) Chain into EX Special → Cool Wheelie and its follow-ups for damage while gathering Determination via hits/dodges/EX. 3) SUSTAIN: re-press Special periodically to keep the Crit DMG buff up, and keep HP above 25% (hits, Dodge Counters and EX all manage/restore HP) so EX stays usable. 4) FINISHER: at 100 Determination, HOLD Basic to unleash Full-Throttle Starlight — his heaviest Sheer DMG payoff. 5) Weave in Chain Attacks and Ultimate when available; quick-swap to a stunner (Dialyn/Ju Fufu) to open/extend the Break window, then hand the field back to Billy and repeat from step 1.
Enter the field with FULL Adrenaline; after landing EX Special (Drive Suppression), Billy's hits ignore 18% Physical RES for 45s (~+14% personal damage, per mobalytics). This is the first worthwhile unlock — instant early-fight burst and a smoother loop. Overall priority still sits behind M2 (game8: M2 > M1).
The recommended stopping point (per game8 + gamewith, priority M2 > M1 > M6 > M4). Main-skill damage (Basic / EX / Ultimate) +50%, plus +50% extra Crit DMG while the enemy is in Break; adds a Turbo Charge follow-up after Cool Wheelie. Billy's single biggest DPS jump — M2 is the ideal cap for most. Note: prioritize his signature Starlight Rider Faceplate BEFORE buying more mindscapes.
All skills +2 levels (Knight's Chivalry). A small flat bump with no gameplay change — low value, just a stepping stone to M4.
Each Special: Drive Suppression grants +8% Crit DMG, stacking up to 2x for 45s (Flames of Justice). A comfy QoL buff with easy uptime but a small bump — only worth it if you're already investing deep, not a stand-alone pull.
All skills +2 levels again (Radiant Armaments). Still just flat numbers, a bridge to M6 — low value.
Capstone (Brilliant Starlight): boosts Sheer DMG on Ultimate and Basic, and adds a Brilliant Starlight stack system (up to 6) — each stack consumed on Ult / Full-Throttle Basic adds a Physical hit equal to 100% Sheer Force to the final blow. Only ~+11% total personal damage (per mobalytics), relatively low for an M6 — whale-tier once you already have signature + M2.
- Sheer DMG fully ignores DEF: excellent against the high-DEF bosses of endgame where normal DPS get walled.
- Very self-sufficient: enters with 60 Adrenaline, self-supplies the Crit DMG buff, and Counters cost no Adrenaline — a tidy kit with little reliance on buffers beyond Rupture support.
- The bike attacks while guarding: built-in defensive/counter frames on-field make him sturdy and harder to interrupt than most on-field DPS.
- Cheap HP scaling: HP is a common, easy-to-farm disc stat, so newer players can put together a serviceable Sheer build before min-maxing CRIT.
- As a Rupture unit, MOST common buffs (ATK%, DMG%) DON'T apply — he needs dedicated Rupture supports (Lucia/Pan Yinhu) to shine; without the right type his output drops noticeably.
- Heavily reliant on his signature Starlight Rider Faceplate (which carries 20% Crit Rate + Sheer DMG); the alternative Rupture engine pool is thin, so off-signature his ceiling drops clearly.
- HP micromanagement: EX Special needs HP above 25% to fire, forcing you to watch the health bar — long field time but sloppy play can lock you out of EX.
Good in Shiyu Defense: single-target Rupture teams (Billy + Dialyn/Pan Yinhu + Lucia) — his DEF-ignoring Sheer DMG melts the mode's high-DEF bosses consistently, and his long on-field burst makes him a solid single-side clearer. Needs a stunner to keep the Break rhythm and Lucia's Rupture buffs to hit his ceiling.
Also solid in Deadly Assault: bosses are tanky and high-DEF, so Billy's DEF-ignore is worth even more; he's durable, deals sustained damage via Full-Throttle Starlight, and rarely gets interrupted thanks to his guard frames. The catch is still needing the full Rupture support package (Lucia/Pan Yinhu); the guide is new (2.8 release) so rankings may shift.
Basic Attack2
Basic Attack: Knight's Technique
Press to activate: Performs up to four attacks forward, dealing Physical DMG. During the 4th hit, press to use Special Attack: Drive Suppression, reducing HP consumption by 50%. Restores a small amount of HP on hit.
Basic Attack: Full-Throttle Starlight
With enough Determination, hold to activate: Charges forward on the motorcycle, then fires a laser beam, dealing massive Physical DMG. Character is invulnerable while using this skill.
Dodge5
Dodge: Close Call!
Press to activate: A quick dash dodge. Character is invulnerable while using this skill.
Dodge: Through the Galaxy
During Special Attack: Drive Suppression, drag the or hold to activate: Drifts with the motorcycle, enabling Perfect Dodges for a brief duration. If a Perfect Dodge is successfully triggered, it immediately chains into Dodge Counter: Afterfire Spin. During this skill, continue dragging the or holding to continue drifting. During this skill, the duration of Special Attack: Drive Suppression will continue, and upon reaching the maximum duration, it automatically chains into EX Special Attack: Cool Wheelie. If the skill ends early, it automatically chains into Special Attack: Run Wild. Character is briefly invulnerable and Anti-Interrupt Level increases during this skill.
Dash Attack: Starlight Retribution
Press during a dodge to activate: Performs a quick forward slash, dealing Physical DMG.
Dodge Counter: Duel King
Press during a Perfect Dodge to activate: Fires a blast from his arm cannon, dealing Physical DMG. If this skill is triggered via a Perfect Dodge, hitting an enemy restores 10% of Max HP, and it can be chained into the 4th hit of Basic Attack: Knight's Technique. Character is invulnerable while using this skill.
Dodge Counter: Afterfire Spin
During Dodge: Through the Galaxy, trigger a Perfect Dodge to activate: Spins with the bike to deal Physical DMG to surrounding enemies. After using this skill, it automatically chains into EX Special Attack: Cool Wheelie. Character is invulnerable while using this skill.
Assist3
Quick Assist: Starlight - Power of Bonds
When the active character is launched, press to activate: Fires a blast from his arm cannon ahead, dealing Physical DMG. When HP is above 25%, this skill is replaced with Special Attack: Drive Suppression. This effect can trigger once every 5s. Character is invulnerable while using this skill.
Defensive Assist: Hero's Entrance
When the on-field character is about to be attacked, press to activate: Parries the enemy's attack, dealing massive Daze. Character is invulnerable while using this skill.
Assist Follow-Up: Villain's Exit
Press after a Defensive Assist to activate: Kicks the motorcycle at the target, dealing massive Physical DMG. Character is invulnerable while using this skill.
Special Attack5
Special Attack: Drive Suppression
When HP is above 25%, press to activate: Consumes HP equal to 16% of Max HP to summon a motorcycle and swiftly crash into enemies, continuously dealing Physical DMG. If attacked by an enemy as the active character shortly upon activating this skill, triggers a block, negating the attack and restoring 5 Determination. After triggering a block, immediately chains into EX Special Attack: Cool Wheelie. After the skill continues for a while, it automatically chains into EX Special Attack: Cool Wheelie. Anti-Interrupt level is increased while using this skill.
Special Attack: Run Wild
Triggers automatically when Dodge: Through the Galaxy is interrupted: Kicks his motorcycle at enemies, dealing Physical DMG. After using this skill, it can be chained into Dodge Counter: Duel King. Anti-Interrupt level is increased while using this skill.
EX Special Attack: Cool Wheelie
Triggers automatically when Special Attack: Drive Suppression reaches its maximum duration or a block is triggered: Lifts the motorcycle to attack enemies, dealing Physical DMG. On hit, restores an additional 8 Determination. After using this skill, with enough Adrenaline, press or hold to chain into EX Special Attack: Rocking Footwork. After the skill animation ends, automatically chains into Special Attack: Run Wild. Character is invulnerable while using this skill.
EX Special Attack: High-Traction Wheels
With enough Adrenaline, hold to activate: Slams down with the motorcycle, dealing Physical DMG. Restores 30% of Max HP upon activating this skill. Character is invulnerable while using this skill.
EX Special Attack: Rocking Footwork
After activating EX Special Attack: Cool Wheelie and with enough Adrenaline, press or hold to activate: Uses the motorcycle and hand cannon for a combined attack, dealing Physical DMG. Upon activating this skill, restore 15% of Max HP. Character is invulnerable while using this skill.
Chain Attack2
Chain Attack: Knight's Swagger
When a Chain Attack is triggered, select the character to activate: Launches a series of attacks forward, dealing massive Physical DMG. Upon activating this skill, gains 15 Determination. Character is invulnerable while using this skill.
Ultimate: Starlight Knight Flying Kick
When Decibel Rating is at Maximum, press to activate: Leaps into the air and delivers a flying kick at the target, dealing massive Physical DMG. Character is invulnerable while using this skill.
Core Skill2
Core Passive: Knight's Resolve
Starlight - Billy gains extra Sheer Force based on his Max HP, with every 1 point of Max HP increasing Sheer Force by 0.1. All Physical DMG Starlight - Billy deals is Sheer DMG, ignoring enemy DEF and using his Sheer Force stat as the DMG Multiplier. Starlight - Billy restores 60 Adrenaline upon entering the battlefield. In Investigation Zone Mode, this effect can trigger once every 180s. When his HP is greater than 25%, press to consume HP and activate Special Attack: Drive Suppression. While in combat, each use of this skill increases his CRIT DMG by 45% for 45s. Repeated triggers refresh the duration. When HP is at or below 25%, the DMG he takes is reduced by 50%. Starlight - Billy gains Determination when his attacks hit enemies, with the amount depending on the skill used. Determination regenerates slowly while in combat, and is capped at 120. Hitting an enemy with EX Special Attack: Cool Wheelie, activating Chain Attack: Knight's Swagger, or triggering a block restores additional Determination. Triggering a Perfect Dodge by any means restores 3 Determination. This effect can trigger once every 0.5s. When Determination is greater than or equal to 100, hold to consume 100 Determination and activate Basic Attack: Full-Throttle Starlight. Hitting an enemy with Basic Attack: Knight's Technique restores a small amount of HP. Hitting an enemy with Dodge Counter: Duel King activated through a Perfect Dodge restores HP. Using EX Special Attack: High-Traction Wheels or EX Special Attack: Rocking Footwork restores HP.*Stats shown are at Base level.
Additional Ability: Blazing Starlight
When another character in your squad is a Stun, Defense, or Support character: Hitting an enemy with EX Special Attack: Cool Wheelie, the 4th hit of Basic Attack: Knight's Technique, Chain Attack, or Ultimate grants 1 stack of Starlight for 45s, up to a maximum of 2 stacks, Only one stack can be obtained per use of a skill. Each stack increases the DMG of Chain Attacks, Ultimates, EX Special Attacks, and Basic Attack: Full-Throttle Starlight by 20%.
What is the best W-Engine for Starlight - Billy?
Starlight - Billy performs best with Starlight Rider Faceplate. See alternatives and required stats in the Gear section above.
Is Starlight - Billy worth pulling?
Worth pulling if you like on-field Rupture burst and own Lucia — Billy converts HP into Sheer Force and ignores DEF, giving a high damage ceiling. Downsides: as a Rupture unit most ordinary buffs do NOT apply to him, so he needs dedicated Rupture supports (Lucia/Pan Yinhu) to reach full power; without the right support type he visibly falls off. This guide is still new, so numbers may be adjusted.
What is the best team for Starlight - Billy?
Starlight - Billy works best in the Standard Rupture team. Full members and rotation are in the Teams section.
Understand the mechanics behind this
Teams→
Drive Disc Scorer→