Starlight Billy Build Guide: HP Scaling, Bike Mode, and Best Teams in ZZZ

Starlight Billy has arrived in Zenless Zone Zero as an S-Rank Physical Rupture Agent from the Cunning Hares, and his new Starlight Knight outfit finally turns a long-running dream into a playable kit. The reference build describes an HP-scaling damage dealer who spends health to keep his bike-mode pressure rolling, then converts successful hits into a full-gauge burst. As of 2026, the agent is tied to the Version 2.8 limited banner Starlight, Shine Bright, which ran from May 27 to June 16, 2026. Community reception is strong: the reference page shows a 9.6/10 score from 25 votes.

Build identity: HP is the engine

The reference build is built around a simple but aggressive idea: Starlight Billy's damage scales off Max HP, and several of his skills restore HP. That makes Max HP both a damage stat and a survival resource. The recommended path maximizes his damage by leaning on buffs from HP and Sheer damage. Players should prioritize HP stats until he reaches his practical ceiling, because most of his skills cost health. In practice, a Starlight Billy with thin HP is not just fragile; he is also giving up damage.

Priority	What it does
Max HP	Raises Rupture damage and gives more room to pay skill costs
Sheer damage buffs	Push the damage profile the build is designed around
HP restoration	Keeps the bike-mode loop active
Stun and Chain Attacks	Feed Determination and create burst windows

Best teams and Bangboo logic

Lucia is the cleanest partner for HP management. Her heals and buffs help Starlight Billy stay in the fight while he pays health for offense. Norma adds Stun and can trigger extra Chain Attacks, which helps Starlight Billy generate more Determination. The F2P route keeps the Cunning Hares together: Anby provides Stun while Nicole supplies general buffs. Neither team is complicated, but both point toward the same plan: create a safe window, land hits, and cash out Determination before the health bill becomes a problem.

Team	Members	Job
Premium sustain	Starlight Billy + Lucia + Norma	Lucia handles heals and HP buffs; Norma adds Stun and extra Chain Attacks
F2P Cunning Hares	Starlight Billy + Anby + Nicole	Anby stuns; Nicole provides general buffs

Bangboo advice in the reference sits beside the team section rather than replacing it. The useful filter is whether a Bangboo adds Stun pressure or helps the team survive the health costs; Starlight Billy already supplies the damage pattern once Determination is online.

W-Engines and Drive Discs

The W-Engine ratings in the reference are based on performance at Update Level 0, so the list is a starting point rather than a final answer for every account. For Starlight Billy, the right W-Engine should reinforce HP scaling, Sheer damage, or the heal-on-skill loop. Drive Discs should follow the same logic: HP first, damage-profile second, and enough comfort to keep the EX Special counter window available. Players should avoid treating generic attack stats as automatically best, because this Rupture kit is not a conventional attack-scaling agent.

How to play: bike mode, counters, and Determination

1. Tap Special Attack to summon the bike for a wheelie attack. With enough Energy, the skill upgrades to EX Special Attack, dealing more damage and restoring some HP.

2. Use the EX Special Attack cast window defensively. If Starlight Billy is attacked while casting the EX wheelie, he can negate incoming damage and deliver a counterattack.

3. After a successful counter, press EX Special Attack again if Energy allows. This follow-up deals significantly more damage and is the main reason to hold Energy for defensive spots.

4. Land hits to charge the Determination gauge below the HP bar. When it is full, hold Basic Attack to unleash a flurry across a wide area.

5. Respect the health bill. Most skills cost HP, so a healer such as Lucia is not a luxury; she keeps the loop from collapsing.

Skill priority and investment

The reference guide separates skill priority from materials and Mindscape Cinema, which is useful because Starlight Billy has two jobs: keeping the bike-mode loop alive and cashing out Determination. Priority should go to the skills that support HP-scaling damage and the EX counter first, with Special Attack and Core Skill at the front. Basic Attack follows because it turns a full gauge into the wide AoE flurry. Dodge and Assist can trail unless a player is still learning the counter timing.

Investment	Why it matters
Core Skill	Supports the HP and Sheer damage profile
Special Attack	Drives bike mode, EX healing, and counter damage
Basic Attack	Converts a full Determination gauge into AoE pressure
Mindscape Cinema	Long-term ceiling after the baseline build is finished

Materials are covered in the dedicated Starlight Billy materials guide, including the full list and calculations. The key reminder is that Core Skill Enhancement per Level matters because the core passive supports the HP and Sheer damage plan.

Mindscape Cinema and acquisition

Mindscape Cinema is the vertical investment layer. It improves the kit, but the reference treats it as separate from the baseline build; players should finish the HP-focused foundation before chasing copies. Starlight Billy was available from the limited banner Starlight, Shine Bright in Version 2.8 from May 27 to June 16, 2026. That window has passed in 2026, so players who missed it should watch for a rerun; the reference does not document a permanent acquisition route.

Voice cast and lore

Language	Voice actor
English	Clifford Chapin
Japanese	Hayashi Yuu
Chinese	Chen Runqiu
Korean	Lee Joo-seung

The Starlight Knight look is not random fan service. Billy's outfit features several upgrades that reflect the Starlight Knight aesthetic, plus the red scarf similar to the one he gave Lighter when he left the Sons of Calydon. The reference notes that Boss Nicole's wallet funded the dream, and that Billy's Trust Events repeatedly mention his wish to become a Starlight Knight. For longtime Cunning Hares fans, the joke and the payoff land at the same time.

Final take

Starlight Billy is a high-score, HP-scaling Rupture agent who rewards players for managing two resources at once: his health bar and his Determination gauge. The build is not about raw attack stacking; it is about Max HP, Sheer damage, and timing the EX Special counter. With Lucia and Norma, he has a stable premium shell. With Anby and Nicole, he has a recognizable Cunning Hares fallback. Either way, the agent's best playstyle is clear in 2026: ride in, counter the hit, refill Determination, and hold Basic Attack when the gauge is full.