ZZZ Starlight Billy Build Guide: Best W-Engine, Drive Discs, Teams and Stats

Starlight Billy is an exciting DPS Agent in Zenless Zone Zero. As an S-Rank Physical Rupture Agent, he brings strong damage, flashy animations, and a fighting style built around his motorcycle, which already makes him stand out from the usual roster.

This guide covers the main things you’ll want to know before building him, including his best W-Engines, Drive Discs, stat priorities, and team choices.

Since Starlight Billy is still in beta, parts of his kit and recommended builds may still change before he officially goes live.

 

Starlight Billy Overview

Starlight Billy is an S-Rank Physical Rupture Agent who focuses on dealing steady damage while taking advantage of stronger burst windows when his setup is in place. He is designed as a main DPS, so most of his value comes from staying on the field long enough to keep pressure up and convert that pressure into meaningful damage.

His biggest visual hook is his motorcycle-based fighting style, which gives him a very distinctive look compared to other Agents. But beyond that, his kit also appears to reward a more proactive playstyle, making him a character who feels best when you can stay in control of the fight and keep his offense rolling.

As a result, Starlight Billy performs best when his build is focused and efficient. He wants gear that improves his consistency, supports his damage output, and helps him get the most out of his role as a Rupture DPS.

 

Skill Upgrade Priority

Core Passive > Special Attack > Basic Attack > Chain Attack > Assist > Dodge

Why this order?

Core Passive should come first because that is usually where a Rupture agent’s biggest payoff sits. If Starlight Billy has conditional effects or team-based requirements tied to his damage ceiling, this is where you get the most meaningful return early on.

Special Attack comes next since it is a major part of converting setup into real damage.

Basic Attack still matters a lot if Starlight Billy is spending real time on the field instead of just jumping in briefly and rotating back out.

Chain Attack is still worth leveling, but it usually is not the first place you want to spend resources unless the rest of the build is already in good shape.

Assist and Dodge sit lower on the list. They help, but they are not the reason you are building him.

 

Best W-Engine for Starlight Billy

If you are aiming for his strongest possible setup, the answer is simple: his signature W-Engine.

It fits his kit cleanly, supports the way he wants to play, and gives him the stats and damage profile you actually want on a Rupture DPS. Starlight Billy wants smooth crit scaling and stronger damage during the sort of attack flow he is already using anyway, so a signature engine that naturally supports that pattern is always going to be the best option.

Best-in-Slot: Signature W-Engine

Starlight Billy’s signature W-Engine is the clear top pick because it helps on multiple fronts at once.

It improves his crit consistency while also boosting the kind of Rupture damage he actually wants. More importantly, it does not look like one of those engines that asks you to play awkwardly just to activate it. More importantly, it fits naturally into his usual rotation instead of forcing awkward play just to keep the passive up.

Alternative W-Engine

If you are not pulling for the signature right away, the best backup plan is usually a Rupture W-Engine that still gives Starlight Billy useful value without wasting stats on the wrong kind of scaling.

Cauldron of Clarity is a strong A-Rank W-Engine pick, since Starlight Billy can activate its DMG bonus without much effort, while also benefiting from the extra HP% and CRIT Rate% it offers.

Radiowave Journey is the top A-Rank W-Engine option for Starlight Billy, granting up to three stacks of Sheer Force. (from the New Eridu City Fund Battle Pass)

Puzzle Sphere is Starlight Billy’s best F2P W-Engine. It gives him a 25.6% CRIT DMG boost, along with a 32% increase to EX Special Attack DMG whenever his HP drops below 50%.

 

Best Drive Discs for Starlight Billy

Drive Disc choices for Starlight Billy are thankfully pretty straightforward.

Best 4-Piece Set

4-pc Yunkui Tales

For now, 4-pc Yunkui Tales is the go-to set for Starlight Billy. If he is your main DPS, this is the first setup you should aim for, since it fits his Rupture playstyle well and gives the rest of the build a solid foundation.

Best 2-Piece Pairings

For the last two slots, you will usually be choosing between:

2-pc Woodpecker Electro

2-pc Branch & Blade Song

Both are workable, and the better option mostly depends on your stat balance.

Woodpecker Electro is the more comfortable choice if your crit rate still needs help. It smooths out the build and makes it easier to land in a healthy crit range without forcing weird compromises.

Branch & Blade Song becomes the better option if your crit rate is already getting too high and you would rather push more damage instead of stacking a stat you no longer need.

Best Drive Disc Setup

For most builds, that means Starlight Billy will want either:

4 Piece Yunkui Tales + 2 Piece Woodpecker Electro

or

4 Piece Yunkui Tales + 2 Piece Branch & Blade Song

That is the core setup. Clean, effective, and easy to build around.

 

Drive Disc Main Stats and Sub Stats

When it comes to main stats, Starlight Billy’s build is pretty clear.

Main Stats

Slot 4	CRIT Rate / CRIT DMG
Slot 5	Physical DMG% or HP%
Slot 6	HP%

Slot 4 being CRIT Rate / CRIT DMG is the easy part.

Slot 5 is where you get a little flexibility. Physical DMG% is the more natural damage-first option, while HP% can still be worth considering depending on how his final scaling settles and what your overall stat spread looks like.

Slot 6 leaning HP% is currently the standard direction.

Sub Stats

For sub stats, the general priority looks like this:

CRIT Rate / CRIT DMG > HP% > ATK %

The main thing you want to avoid is building so much crit rate that you start wasting value. If your crit rate is already in a good spot, that is usually when it makes sense to move away from Woodpecker and into a more damage-focused 2-piece option.

So the real rule here is simple:

stabilize your crit first, then push greedier damage stats.

That is how you keep the build efficient instead of just stacking random shiny numbers.

 

Best Teams for Starlight Billy

Starlight Billy’s team options are not completely rigid, but the overall logic behind them is pretty easy to follow. Once you understand what he wants, the team-building part gets much simpler.

Starlight Billy + Lucia + Ju Fufu

Starlight Billy	Lucia	Ju Fufu

This is the most comfortable and easiest-to-run version of a strong Starlight Billy team.

Lucia is the centerpiece here because Starlight Billy as a Rupture carry really does not want to miss out on strong Sheer support. She brings the kind of buffs he actually wants, not just generic value.

Ju Fufu works well as the third slot if you want a team that feels stable and forgiving. The rotation is easier to handle, the setup feels smoother, and the whole lineup is less punishing if your execution is not perfect every time.

Starlight Billy + Lucia + Dialyn

Starlight Billy	Lucia	Dialyn

This version is more for players who are confident in their execution.

The structure is still the same: Lucia fills the must-have support role, while Dialyn takes the third slot as a more performance-driven option. Compared to Ju Fufu, this team can feel sharper if your hands are good and your rotations are clean.

Starlight Billy + Lucia + Caesar

Starlight Billy	Lucia	Caesar

Caesar may not always give Starlight Billy the flashiest damage increase, but shielding matters a lot in actual gameplay. A shield means fewer interruptions, safer uptime, and an easier time staying in rhythm during your important damage windows.

That is especially valuable for a carry who does not want to keep getting knocked out of pressure by random hits.

Caesar can also do his job and rotate out, which keeps the team from feeling too clunky.

 

Conclusion

Build around his strengths, keep the setup focused, and Starlight Billy should feel much better in practice than he might at first glance.

And if you are planning to pull Starlight Billy, grab his W-Engine, or build up the rest of your squad without spending more than you need to, LDShop is a convenient place to top up Monochrome for less. It is a useful option if you want to save a bit while pulling Starlight Billy and putting the rest of his build together.