Billy - Starlight
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 functions as a high-mobility attacker who balances offense with health consumption mechanics [L78, L113]. He utilizes a unique 'Drive Suppression' state to deal massive physical damage while simultaneously recovering health through specific dodges and counters [L78, L103, L113]. His playstyle revolves around building 'Determination' to unleash powerful Full-Throttle Starlight attacks while navigating the field with invulnerable drifts and counters [L83, L93, L108].
Overview
Quick Build
W-Engine
Starlight Rider Faceplate
S-rank — HP %, best in slot
Disk Set
Yunkui Tales
4-PC · Best in slot
Disk 4
CRIT Rate% = CRIT DMG% = HP%
Main stat
Disk 5
Physical DMG% > HP%
Main stat
Disk 6
HP%
Substats
CRIT Rate >= CRIT DMG = ATK%
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]
- Strong adaptability against bosses via perfect dodge counters [L93, L108]
- Synergistic kit that rewards aggressive positioning and counter-attacks
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]
- Requires specific team compositions for maximum potential
- Vulnerable if out of Determination for key moves
Skill Priority
Primary damage source.
EX delivers strong damage.
Chain burst.
Passive enhancement.
Negligible.
Stat Priority
Standard high-utility rotation focusing on maximizing Physical RES shred and sustained field time [L51-53].
Defensive-oriented rotation for challenging encounters requiring more frequent damage negation [L61-63].
Review and adjust rotations based on your specific team composition.
W-Engines
S-Rank W-Engines
HP%
Increases CRIT Rate by 20%. When the equipper launches a Special Attack, their Physical Sheer DMG increases by 10%, stacking up to 2 times and lasting 30s. Repeated triggers reset the duration.
Why it works —Best-in-slot; provides high CRIT Rate and consistent Physical Sheer DMG buffs based on Special Attack usage.
HP%
CRIT Rate increases by 20/23/26/29/32%. When the equipper launches an EX Special Attack, the character gains 1 stack of Qingming Companion effect, stacking up to 2 times and lasting 15s. On entering combat, immediately gain 2 stacks. Repeated triggers reset the duration. Each stack of the Qingming Companion effect increases the equipper's Ether DMG by 8/9.2/10.4/11.6/12.8%, and increases Ultimate and EX Special Attack Ether Sheer DMG by 10/11.5/13/14.5/16%.
Why it works —High CRIT Rate stat stick that rewards EX Special usage, though Ether bonuses are wasted.
A-Rank W-Engines
HP%
When the equipper activates an EX Special Attack, they gain 1 stack of a buff. Each stack increases the equipper's DMG by 4/4.6/5.2/5.8/6.4%, up to 3 stacks, and lasting 20s. This effect can trigger once every 0.5s, and repeated triggers reset the duration. At 3 stacks, the equipper's CRIT Rate increases by 6.5/7.5/8.5/9.4/10.4%.
Why it works —Excellent F2P choice for consistent DMG and CRIT Rate increases through stacked EX Special Attacks.
HP%
The equipper's Fire DMG increases by 15/17.25/19.5/21.75/24%. When the equipper's HP decreases, their CRIT Rate increases by 15/17.25/19.5/21.75/24% for 5s.
Disk Drives
Disk 4
CRIT Rate% = CRIT DMG% = HP%
Disk 5
Physical DMG% > HP%
Disk 6
HP%
Team Compositions
Starlight: Billy
Main DPS
Dialyn
Stun
Lucia
Support
High-usage endgame shell featuring Starlight: Billy, Dialyn, Lucia. Built around Starlight: Billy's Main DPS role with teammates covering stun, buffs, or secondary damage.
Primary Main DPS — owns the damage / utility identity of this squad.
Opens stun windows so Billy - Starlight can dump burst damage safely.
Buffs and enables Billy - Starlight with low field time and strong team utility.
Skills & Mindscapes
Skills
Press Basic Attack to activate: Performs up to four attacks forward, dealing Physical DMG. During the 4th hit, press Special Attack to use Special Attack: Drive Suppression, reducing HP consumption by 50%. Restores a small amount of HP on hit.
With enough Determination, hold Basic Attack to activate: Charges forward on the motorcycle, then fires a laser beam, dealing massive Physical DMG. Character is invulnerable while using this skill.
Press Dodge to activate: A quick dash dodge. Character is invulnerable while using this skill.
During Special Attack: Drive Suppression, drag the / or hold Dodge 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 Dodge 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.
Press Basic Attack during a dodge to activate: Performs a quick forward slash, dealing Physical DMG.
Press Basic Attack 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.
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.
When HP is above 25%, press Special Attack 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.
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.
Mindscapes
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 the duration.
Is it worth getting?
Essential for the 18% Physical RES shred, drastically increasing his output against tanky enemies.
Increases the DMG dealt by Basic Attack: Full-Throttle Starlight, EX Special Attack: Cool Wheelie, and Ultimate: Starlight Knight Flying Kick by 50%. Activating EX Special Attack: Rocking Footwork, EX Special Attack: High-Traction Wheels, or hitting a Stunned enemy with Special Attack: Drive Suppression grants the Turbocharged effect: Special Attack: Drive Suppression consumes this effect to immediately follow up with EX Special Attack: Cool Wheelie, and increases that instance's CRIT DMG by 50%. Only 1 stack of Turbocharged can be held.
Is it worth getting?
Massive damage boost for core skills and creates a simplified path to follow-up EX attacks.
Basic Attack, Assist, Dodge, Special Attack, and Chain Attack Lv. +2
Is it worth getting?
Skill-level bump only — fine on the path to higher Mindscapes, not a pull goal by itself.
While in combat, each use of Special Attack: Drive Suppression increases Starlight - Billy's CRIT DMG by 8%, stacking up to 2 times and lasting 45s. Repeated triggers reset the duration. If HP is below 35% and Starlight - Billy is not the active character, he continuously recovers HP, up to 35%.
Is it worth getting?
Solid CRIT upgrade — helps hit thresholds and raises personal damage cleanly.
Basic Attack, Assist, Dodge, Special Attack, and Chain Attack Lv. +2
Is it worth getting?
Skill-level bump only — fine on the path to higher Mindscapes, not a pull goal by itself.
Ultimate: Starlight Knight Flying Kick and Basic Attack: Full-Throttle Starlight's Sheer DMG increases by 18%. Landing the 4th hit of Basic Attack: Knight's Technique, EX Special Attack: Cool Wheelie, or Chain Attack: Knight's Swagger grants 1 stack of Brilliant Starlight, stacking up to 6 times, and gaining at most 1 stack per skill use. When using Ultimate: Starlight Knight Flying Kick or Basic Attack: Full-Throttle Starlight, consumes up to 2 stacks of Brilliant Starlight, with each stack consumed causing that skill's final hit to deal 100% Sheer Force as additional Physical DMG.
Is it worth getting?
Meaningful Rupture / HP-scaling bump — worth it if this agent is your main carry.
Billy - Starlight is viable and competitive at M0. First stop: M2. Endgame target: M2.
Alternatives to Billy - Starlight
Not sure Billy - Starlight is right for you? Compare against other Rupture agents to find your best pull.
You need a Fire Rupture agent and Banyue's kit matches your account gap.
You need a Fire Rupture agent and Manato's kit matches your account gap.
You need a Ice Rupture agent and Yidhari's kit matches your account gap.
You need a Ether Rupture agent and Yixuan's kit matches your account gap.