Billy

Billy Kid

Physical

Attack

Pierce

Cunning Hares

Best Billy Build Guide

Written by Phạm Ngọc Bảo Châu · Updated 6 Oct 2026

Playstyle Overview

Billy is a free A-Rank Physical Attack DPS, a mobile ranged fighter. Holding Basic Attack puts him into Crouching Shot for continuous fire, boosted 25% by his Core Passive. His Additional Ability adds 50% Ultimate DMG for each Chain Attack used beforehand (up to 2), so Chains and Ultimates are his main burst.

Outside Stun, Billy deals steady damage with Basic Attacks, Dash Attacks and Dodge Counters. Once the enemy is Stunned, you unload Chain Attacks and then his Ultimate. He is easy to pick up but has a high skill ceiling. Build CRIT and ATK. On the downside, he has aged poorly against modern DPS units, and his dated Additional Ability condition limits team options.

Best W-Engines

Cloudcleave Radiance

ATK 743 · CRIT DMG 48%

Ye Shunguang's signature. Billy can't activate Ether Veil, so its DMG buffs never apply, but the Physical RES ignore always works. Its high Base ATK and CRIT DMG main stat put it above every other option when dupes aren't counted.

Jade Soul, Frozen Heart ›

The equipper's DMG ignores 20% of the target's Physical RES. When the equipper activates an Ether Veil, the equipper's DMG increases by 25% and CRIT DMG increases by 25% for 40s. Repeated triggers reset the duration.

Heartstring Nocturne

ATK 713 · CRIT Rate 24%

A great stat stick with lots of unconditional CRIT Rate and CRIT DMG.

String & Melody ›

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.

*Stats shown are at Base level.

The Brimstone

ATK 684 · ATK% 30%

Billy's best Standard engine. His loop of Basic Attacks, Dash Attacks and Dodge Counters keeps its ATK stacks up almost constantly. At S5 it's his strongest option. The catch is that it has no CRIT Rate and low Base ATK, which makes building around it harder.

Scorching Breath ›

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.

*Stats shown are at Base level.

Steel Cushion

ATK 684 · CRIT Rate 24%

Nekomata's signature, with a CRIT Rate main stat, Physical DMG and a back-attack DMG bonus. Billy's mobility helps keep it up, but many of his shots push him away, so full uptime isn't realistic.

Metal Cat Claws ›

Increases Physical DMG by 20%. The equipper's DMG increases by 25% when attacking the enemy from behind.

*Stats shown are at Base level.

Starlight Engine Replica

ATK 624 · ATK% 25%

His signature and best A-Rank option. It gives a huge Physical DMG bonus when Basic or Dash Attacks hit from 6m or more, which is easy to maintain with his ranged style. At S5 it can rival the best picks.

Knight Beam: Change ›

Increases the equipper's Physical DMG against the target by 36% for 8s upon hitting an enemy at least 6 meters away with a Basic Attack or Dash Attack.

*Stats shown are at Base level.

Starlight Engine

ATK 594 · ATK% 25%

The best craftable engine. Its ATK buff after Dodge Counters stays up almost permanently outside Stun, but you need Quick Assists to keep it through a full Stun. Marcato Desire is another good free option.

Knight Plummel ›

Launching an Assist Attack increases the equipper's ATK by 12% for 12s.

*Stats shown are at Base level.

Best Drive Discs

Woodpecker Electro

4-pc ›

2-piece:

CRIT Rate +8%

4-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.

Branch & Blade Song

2-pc ›

2-piece:

CRIT DMG +16%

The best set. Crouching Shot and Rolling Shot both count as Basic Attacks, and with frequent Dodge Counters you can easily hold at least 2 stacks. During Stun, his EX Special replaces the Dodge Counter stack.

Shadow Harmony

4-pc ›

2-piece:

The DMG of Aftershocks and Dash Attacks is increased by 15%.

4-piece:

Upon hitting an enemy with an Aftershock or Dash Attack, if the DMG dealt aligns with the equipper's attribute, the equipper gains 1 stack of a buff effect, at most once per use of a skill. For each stack, the equipper's ATK increases by 4%, and CRIT Rate increases by 4%. The effect can stack up to 3 times and lasts for 15s. Repeated triggers reset the duration.

Woodpecker Electro

2-pc ›

2-piece:

CRIT Rate +8%

Not the strongest, but the most consistent. Billy constantly loops his spinning Dash Attack, so he keeps max CRIT Rate and ATK stacks without you having to manage anything.

Puffer Electro

4-pc ›

2-piece:

PEN Ratio +8%

4-piece:

Ultimate DMG increases by 20%. Launching an Ultimate increases the equipper's ATK by 15% for 12s.

Woodpecker Electro

2-pc ›

2-piece:

CRIT Rate +8%

Its Ultimate DMG bonus is less valuable since Billy already has plenty from his Additional Ability, but the combat ATK is very welcome. It gets better with Dialyn, who lets him use an Ultimate every Stun. It suits a burst playstyle.

Dawn's Bloom

4-pc ›

2-piece:

Increases Basic Attack DMG by 15%.

4-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.

Woodpecker Electro

2-pc ›

2-piece:

CRIT Rate +8%

Billy uses Basic Attacks constantly, so he gets a lot out of the Basic Attack DMG bonus. 2-piece Woodpecker Electro adds CRIT Rate.

Best Main Stats

Disc 4CRIT Rate / CRIT DMG (or ATK%)
Disc 5PEN Ratio / ATK% / Physical DMG
Disc 6ATK%

Best Sub Stats

1CRIT Rate
2CRIT DMG
3ATK%
4PEN
5Flat ATK

Endgame Stats

ATK: 2400 – 2800+
HP: 9000+
DEF: 800+
CRIT Rate: 70 – 80%
CRIT DMG: 140 – 160%+

Balance CRIT Rate, CRIT DMG and ATK. Overinvesting in one or two of them isn't optimal. With M4, his EX Special gains extra CRIT Rate up close, so you don't need to overinvest in CRIT Rate.

Skill Priority

Core Skill
›Chain Attack
›Basic Attack
›Special Attack
›Dodge
›Assist

His Core Skill boosts Crouching Shot damage, so max it early. Chain Attack/Ultimate is his biggest burst thanks to his Additional Ability, while Basic Attack is his most consistent damage. The two are nearly equal. Special Attack and Dodge follow, with Assist last.

Best Teams for Billy

Dialyn Teams

Dialyn is a fellow Physical Agent, so she activates his Additional Ability, and she converts Chain Attacks into Ultimates so Billy can use his Ultimate more often. Nicole, from his faction, shreds DEF on top of Dialyn's debuffs.

Billy

Dialyn

Astra Yao

Dialyn is Billy's best Stunner. With Astra Yao, the team gets enormous damage buffs plus enough Chains to build his stacks and enough Ultimates to spend them. Dialyn works both on-field and off-field, and she also extends Stun duration.

Additional Ability Teams

Billy

Caesar

Trigger

Caesar shares his Physical Attribute, so she enables his Additional Ability. She also supplies the Daze Billy lacks, buffs ATK and makes enemies take more DMG. Trigger adds big buffs, debuffs and Daze.

Billy

Nicole

Astra Yao

Nicole is a fellow Cunning Hare, so they activate each other's Additional Abilities. Billy uses her DEF shred to burst during Stun, while Astra Yao provides all-round buffs.

F2P Team

A free team that activates all three Additional Abilities. Billy deals the damage, Nicole shreds DEF and groups enemies, and Anby Stuns and Shocks.

Best Bangboo for Billy

Amillion

Bagboo

Avocaboo

Amillion is the main pick when Billy runs with Nicole (needs two Cunning Hares members). In the F2P team, use Bagboo. It always activates its Additional Ability since Billy is an Attack Agent. If you want healing, Avocaboo is an alternative for both teams.

Skills

Basic Attack: Full Firepower

Press Basic to activate:

Unleashes a piercing attack, dealing Physical DMG.

Repeatedly press or hold to enter Crouching Shot to extend the attack duration.

Drag the Move during Crouching Shot to launch Rolling Shot and adjust the character's position, dealing Physical DMG.

Stop pressing or holding during Crouching Shot to launch Finishing Shot at enemies in front, dealing Physical DMG.

Skill levelLv.12

Basic Attack: Full Firepower
Standing Fire DMG Multiplier	136.2%
Standing Bullet DMG Multiplier	15.3%
Crouching Fire DMG Multiplier	124.5%
Crouching Bullet DMG Multiplier	25.9%
Rolling Shot DMG Multiplier	124.5%
Finishing Shot DMG Multiplier	99.0%
Standing Fire Daze Multiplier	81.9%
Standing Bullet Daze Multiplier	9.4%
Crouching Fire Daze Multiplier	82.2%
Crouching Bullet Daze Multiplier	14.4%
Rolling Shot Daze Multiplier	82.2%
Finishing Shot Daze Multiplier	83.8%

Dodge: Risky Business

Press Dodge to activate:

A rapid dodge.

Character is invulnerable while using this skill.

Dash Attack: Starlight Sanction

When dragging theMoveduring a dodge, press Basic:

Launches a piercing attack at nearby enemies within a large area, dealing Physical DMG.

When not dragging the Move during a dodge, press Basic:
Launches a piercing attack at enemies in a line, dealing Physical DMG.

Dodge Counter: Fair Fight

Press Basic during a Perfect Dodge to activate:

Pierces enemies in front, dealing Physical DMG.

Character is invulnerable while using this skill.

Skill levelLv.12

Dash Attack: Starlight Sanction
360-degree Shot DMG Multiplier	126.8%
Straight Shot DMG Multiplier	78.6%
360-degree Shot Daze Multiplier	94.9%
Straight Shot Daze Multiplier	29.4%

Dodge Counter: Fair Fight
DMG Multiplier	443.6%
Daze Multiplier	290.2%

Quick Assist: Power of Teamwork

When the on-field character is launched, press Switch to activate:

Launches a piercing attack at enemies in front, dealing Physical DMG.

Character is invulnerable during the attack.

Evasive Assist: Flash Spin

When the character on field is about to be attacked, press Switch to activate:

Dodges the enemy's attack and activates Vital View.

Character is invulnerable while using this skill.

Assist Follow-Up: Fatal Shot

Press Basic after an Evasive Assist to activate:

Pierces enemies in a large area in front, dealing Physical DMG.

Character is invulnerable while using this skill.

Skill levelLv.12

Quick Assist: Power of Teamwork
DMG Multiplier	186.9%
Daze Multiplier	140.7%

Assist Follow-Up: Fatal Shot
DMG Multiplier	778.2%
Daze Multiplier	512.8%

Special Attack: Stand Still

Press Special to activate:

Performs up to 3 piercing attacks in a line, dealing Physical DMG.

Anti-Interrupt level is increased while using this skill.

EX Special Attack: Clearance Time

With enough Energy, press EX to activate:

Launches a powerful piercing attack in a line, dealing massive Physical DMG.

Character is invulnerable while using this skill.

Skill levelLv.12

Special Attack: Stand Still
1st-Hit DMG Multiplier	48.4%
2nd-Hit DMG Multiplier	103.4%
3rd-Hit DMG Multiplier	100.7%
1st-Hit Daze Multiplier	36.3%
2nd-Hit Daze Multiplier	78.1%
3rd-Hit Daze Multiplier	75.4%

EX Special Attack: Clearance Time
DMG Multiplier	1088.3%
Daze Multiplier	659.5%

Chain Attack: Starlight Mirage

When a Chain Attack is triggered, select the character to activate:

Unleashes a powerful piercing attack at surrounding enemies in a large area, dealing massive Physical DMG.

Character is invulnerable while using this skill.

Ultimate: Starlight, Shine Bright

When Decibel Rating is at Maximum, press Ultimate to activate:

Unleashes a powerful piercing attack at surrounding enemies in a large area, dealing massive Physical DMG.

Character is invulnerable while using this skill.

Skill levelLv.12

Chain Attack: Starlight Mirage
DMG Multiplier	1471.1%
Daze Multiplier	295.6%

Ultimate: Starlight Sparkle
DMG Multiplier	3196.0%
Daze Multiplier	286.3%

Core Passive: Steady Shot

Billy's DMG increases by 25% when he enters Crouching Shot during his Basic Attack. The effect ends if he moves, returns to standby, or is knocked back or launched by an attack.

*Stats shown are at Base level.

Additional Ability: Team Starlight

When another character in your squad shares the same Attribute or Faction:

After Billy uses a Chain Attack, the DMG of his next Ultimate is increased by 50%, stacking up to 2 times. This effect resets whenever an Ultimate is activated.

Skill levelLv.7 (F)

Core Passive: Steady Shot
Damage Increase	50%
CRIT Rate	4.8%
Base ATK	-

Mindscape Cinema

Which Mindscapes Are Worth It?

M6 is the most valuable upgrade thanks to its stacking DMG bonus, which pairs well with M2. M2 and M4 are decent, and M1 only adds a bit of Energy. No level is essential. If you want to invest, aim for M6. M3 and M5 only add skill levels and are not counted.

M1
Dash Attacks and Dodge Counters restore an extra 2.7 Energy on hit (once every 5s). Helpful, but minor.
M2
+25% Dodge Counter DMG. Rolling Shots count as dodges, so they can trigger Perfect Dodges that automatically follow up with a Dodge Counter. It's strong, but tricky to use, and it lengthens the rotation.
M4
His EX Special gains up to 32% CRIT Rate the closer he is to the target, the opposite of his ranged style. Just keep his signature's buff up and step in close for the EX Special.
M6
Every 10 hits or Perfect Dodge grants 6% DMG, stacking 5 times. The stacks reset if he is knocked back or launched. It's a clear damage increase.

Dazzling EntranceRecommended

When Billy hits an enemy with a Dash Attack or Dodge Counter, he gains an additional 2.7 Energy. Can trigger once every 5s.

"You guys are way too honest to be bad guys!"
"All lined up, like NPCs at the shooting range!"

Roaming GunslingerRecommended

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 with a Dodge Counter.

"The Starlight Knights never run from danger. That's what we call tactical repositioning for better aim!"
— User "Dreamgirl Monica" from the Starlight Radiance messageboards.

Teachings of the Starlight Knights

Basic Attack, Dodge, Assist, Special Attack, and Chain Attack Lv. +2

Never neglect your training, and never stop improving! This is the philosophy of the Starlight Knights. Billy believes in it wholeheartedly, and practices it sincerely.

Starlight BallisticsRecommended

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%.

These explosive bullets of Billy's own invention are incredibly lethal at close range.
Their performance far outstrips Billy's original intention of simply making them cooler.

Lost Technological Construct

Basic Attack, Dodge, Assist, Special Attack, and Chain Attack Lv. +2

Unknown precision components and unique structural design have given Billy performance far beyond his peers... And maintenance costs far beyond his means.

Starlight HeroRecommended

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 if he is knocked back or launched by an enemy.

"Hooboy~ Feelin' great! Move aside, Anby, it's my time to shine!"
"Yo, Anby — can you play the Starlight Knight theme?"
—excerpt from Cunning Hares' "Top 10 Forbidden Sentences," selected by Anby

Base Stats

Stats at Lv.60

HP: 6907
ATK: 712
DEF: 49
Impact: 91
CRIT Rate: 5%
CRIT DMG: 50%
Anomaly Proficiency: 98
Anomaly Mastery: 102
PEN Ratio: 0%
Energy Regen: 1.2

Stats by level

Level	HP	ATK
1	555	113
10	1233	173
10+	1614	213
20	2367	280
20+	2748	321
30	3502	389
30+	3883	429
40	4637	496
40+	5018	537
50	5771	604
50+	6153	644
60	6907	712

Profile

Faction: Cunning Hares
Gender: Male
Height: 188 cm
Birthday: Nov 25
Release version: 1.0
Signature W-Engine: Starlight Engine Replica
Voice actors (English): Clifford Chapin
Voice actors (Chinese): 陈润秋 (Chen Runqiu)
Voice actors (Japanese): 林勇 (Hayashi Yuu)
Voice actors (Korean): 이주승 (Lee Ju-seung)

"The Starlight Knights never lose!"

This handsome cyborg with a cool and carefree personality is an avid fan of the Starlight Knight show, not only referring to himself as one of the Starlight Knights, but repeating many classic lines from the show.

He may look unreliable, but once he gets serious, Billy can take on any challenge...

He seems carefree, but his strength can be relied on.

Story

Details

Billy Kid, an AI construct that has passed the forbidden fruit test, is essentially a self-aware machine.

True to his name, despite having the appearance of a robot, he is quite childlike.

He's a big fan of the visual FX show "Starlight Knight" and wishes to be a hero like the main characters of the show. He often refers to himself as a Starlight Knight and imitates the lines in the show.

Such behavior appears to be only for comedic effect, however.

"Don’t make me sound like an idiot! I'm obviously very smart!" — Billy.

Increase Trust to Close to unlock more

Similar to Anby, there are gaps in Billy's personal history that remain unfilled.

The available information indicates that before joining Gentle House, Billy spent an extended period serving with another mysterious gang.

As of now, it appears Billy still maintains a close connection with a certain gang leader from the Outer Ring of New Eridu.

Cooperation Notes:

Belle

Weren't you obsessed with the Starlight Knight series as a kid, Wise?

That brings me back. You shouting "Starlight Mirage!" with your arms crossed...

Wise

There was never such a time. Please erase such non-existent memories from your mind.

It's been a long time since I was that age, after all, and my name doesn't have "kid" in it.

Ghi Chú Hợp Tác

Belle

Bản đặc biệt của loạt phim "Kỵ Sĩ Ánh Sao", lúc nhỏ dường như anh Wise cũng rất thích? Ôi, nhớ ghê, lúc anh chống tay lên hông hét to "Ào Ành Ánh Sao!"...

Wise

Làm gì có chuyện đó. Hãy xóa những ký ức không tồn tại này ra khỏi đầu em. Anh đã ra khỏi độ tuổi đó từ lâu rồi, dù sao thì trong tên anh cũng không có chữ "Kid".