Theorylytics
Lucy
FireSupportSons of Calydon★★★★ A-Rank

Lucy

Published Jul 19, 2026 · Updated v3.0
Content Ratings
Shiyu DefenseA
Deadly AssaultA
Hollow ZeroB
Should You Pull?YES

Lucy is a premier support unit who provides significant team-wide ATK buffs through her guard boars. Her ability to maintain high uptime on offensive support makes her an essential asset for any Fire or faction-synergized composition.

Lucy functions as an off-field support who deploys guard boars to aid in combat and provide utility. By utilizing her EX Special Attack, she grants the Cheer On! status to the squad, significantly boosting ally ATK based on her own total stats. She requires strategic energy management to ensure her buffs remain active during critical damage windows.

SupportFireBuffingOff-fieldSub-DPSEnergy-focusedSons of Calydon

Overview

Quick Build

W-Engine

Kaboom the Cannon

S-rank — Energy Regen, best in slot

Disk Set

Moonlight Lullaby

4-PC · Best in slot

Disk 4

ATK% > CRIT Rate%

Main stat

Disk 5

ATK%

Main stat

Disk 6

Energy Regen = ATK%

Substats

ATK% (top priority until ability cap) = CRIT RATE = CRIT DMG > PEN = ATK

Strengths

  • Provides significant flat and percentage ATK buffs to the team.
  • Guard boars inherit stats for meaningful off-field damage contribution.
  • Easy activation of Cheer On! status via EX Special.
  • Synergizes well with Sons of Calydon and same-attribute teammates.
  • Invulnerability frames during Home Run! allow for safe skill execution.

Weaknesses

  • Buff effectiveness is capped, limiting hyper-investment returns.
  • Relies heavily on energy regeneration to maintain buff uptime.
  • Requires specific team compositions to maximize Additional Ability passives.
  • Positioning of guard boars can be inconsistent in high-mobility encounters.
  • Damage output drops significantly if energy generation is starved.

Skill Priority

1
Basic AttackHighest

Primary damage source.

2
Special AttackHigh

EX delivers strong damage.

3
Chain AttackMedium

Chain burst.

4
Core PassiveMedium

Passive enhancement.

5
DodgeLow

Negligible.

Stat Priority

1
CRIT Rate75–80%
2
CRIT DMG150–200%
3
ATK2500+
4
Anomaly Proficiency120+
5
HP10000+
6
PEN RatioAs available
Rotation Priority
General Support

Use EX Special to trigger Cheer On!, then swap to primary DPS to capitalize on the ATK buff.

Energy
Sons of Calydon

Ensure Basic Attack sequences are used to trigger boar Spinning Swing alongside your active attacker.

Skill Usage

Review and adjust rotations based on your specific team composition.

W-Engines

S-Rank W-Engines

2
Weeping Cradle

Energy Regen

While off-field, Energy Regen increases by 0.6/0.75/0.9/1.05/1.2 per second. Attacks from the equipper enhance the squad's DMG against a struck target by 10/12.5/15/17.5/20% for 3 seconds. During this period, this effect is further increased by 1.7/2/2.5/3/3.3% every 0.5s, up to a maximum additional increase of 10.2/12/15/18/19.8%. Repeated triggers only refresh its duration without refreshing the DMG increase effect. Passive effects of the same name do not stack.

Why it works —Weeping Cradle is usable for higher energy regen but loses efficiency compared to dedicated support engines.

A-Rank W-Engines

1
Kaboom the Cannon

Energy Regen

When any friendly unit in the squad attacks and hits an enemy, all friendly units' ATK increases by 2.5/2.8/3.2/3.6/4% for 8s, stacking up to 4 times. The duration of each stack is calculated separately, and each friendly unit can provide 1 stack of the buff. Passive effects of the same name do not stack.

Why it works —Kaboom the Cannon provides essential energy regeneration and consistent ATK stacking for the team.

3
Slice of Time
Slice of TimeBF2P Best

Energy Regen

Any squad members' Dodge Counter, EX Special Attack, Assist Attack, or Chain Attack respectively generates 20/23/26/29/32 (Dodge) | 25/28.5/32/35.5/40 (Special) | 30/34.5/39/43.5/48 (Assist) | 35/40/45/50/55 (Chain) more Decibels and generates 0.7/0.8/0.9/1/1.1 Energy for the equipper. This effect can trigger once every 12s. The cooldown for each type of attack is independent of others. Passive effects of the same name do not stack.

Why it works —Slice of Time is a reliable F2P option for managing energy via multiple rotation triggers.

5
Unfettered Game Ball

CRIT Rate

Whenever the equipper's attack triggers an Attribute Counter effect, all squad members' CRIT Rate against the struck enemy increases by 12/13.5/15.5/17.5/20% for 12s. The bonuses triggered by the same type of passive effects do not stack.

B-Rank W-Engines

4
[Reverb] Mark II

Energy Regen

Launching an EX Special Attack or Chain Attack increases all squad members' Anomaly Mastery and Anomaly Proficiency by 10/12/13/15/16 for 10s. This effect can trigger once every 20s. Passive effects of the same name do not stack.

Disk Drives

Moonlight Lullaby (4-PC)
SMoonlight Lullaby (4-PC)Best in Slot
4PCWhen the equipper is a Support character and uses an EX Special Attack or Ultimate, the DMG dealt by all squad members increases by 18% for 25s. Repeated triggers reset the duration. Passive effects of the same name do not stack.
2PCPair with: Puffer Electro, Astral Voice, Hormone Punk, Phaethon's Melody, Chaos Jazz, Fanged Metal.
Optimizes the ATK-scaling nature of Lucy's Cheer On! buff.

Disk 4

ATK% > CRIT Rate%

Disk 5

ATK%

Disk 6

Energy Regen = ATK%

Astral Voice (4-PC)
BAstral Voice (4-PC)
4PCWhenever any squad member enters the field using a Quick Assist, all squad members gain 1 stack of Astral, up to a maximum of 3 stacks, and lasting 15s. Repeated triggers reset the duration. Each stack of Astral increases the DMG dealt by the character entering the field using a Quick Assist by 8%. Only one instance of this effect can exist in the same squad.
2PCPair with: Puffer Electro, Hormone Punk, Phaethon's Melody, Chaos Jazz, Fanged Metal.
Provides consistent utility for team-wide support and buff uptime.

Disk 4

ATK% > CRIT Rate%

Disk 5

ATK%

Disk 6

Energy Regen = ATK%

Swing Jazz (4-PC)
SSwing Jazz (4-PC)
4PCLaunching a Chain Attack or Ultimate increases all squad members' DMG by 15% for 12s. Passive effects of the same name do not stack.
2PCPair with: Puffer Electro, Astral Voice, Hormone Punk, Phaethon's Melody, Chaos Jazz, Fanged Metal.
Essential for players focusing on frequent Ultimate and Chain Attack rotations.

Disk 4

ATK% > CRIT Rate%

Disk 5

ATK%

Disk 6

Energy Regen = ATK%

Team Compositions

Lucy

Lucy

Support

Burnice

Burnice

Anomaly

Velina

Velina

Anomaly

High-usage endgame shell featuring Lucy, Burnice, Velina. Built around Lucy's Support role with teammates covering stun, buffs, or secondary damage.

Agent Synergy
Lucy
LucySupport

Primary Support — owns the damage / utility identity of this squad.

Burnice
BurniceAnomaly

Secondary Anomaly / Disorder partner that amplifies Lucy's damage windows.

Velina
VelinaAnomaly

Secondary Anomaly / Disorder partner that amplifies Lucy's damage windows.

Skills & Mindscapes

Skills

Core PassiveCrimson Mane Guard

When Lucy uses her Special Attack or EX Special Attack, a guard boar will join the battle and call in two other guard boars. The guard boars inherit Lucy's ATK and Impact. The Cheer On! buff for the guard boars is increased to 140% of the original effect, and their attack frequency is increased.

Additional AbilityBatter Up!

When another character in your squad shares the same Attribute or Faction or is a Rupture character: The guard boars inherit Lucy's CRIT Rate and CRIT DMG.

Basic AttackLady's Bat

Strike forward up to 4 times, dealing Physical DMG and Fire DMG. When Lucy uses her fourth Basic Attack, the currently on-field guard boars will launch Guard Boars: Spinning Swing! together.

EX Special AttackHome Run!

Recall a guard boar and launch it as a Line Drive. The guard boar will cause an explosion upon hitting enemies, or walls, dealing massive Fire DMG. Character is invulnerable while using this skill. When enough energy, hold Special Attack to activate: Recall a guard boar and launch it as a Fly Ball. The guard boar will cause an explosion upon landing, dealing massive Fire DMG. Character is invulnerable while using this skill. When the skill hits an enemy, it triggers a Quick Assist.

Cheer On!Cheer On!

After using EX Special Attack, when a guard boar triggers an explosion, it will apply the Cheer On! status to all allies, Bangboo, and the guard boars themselves. While under the Cheer On! status, allies' ATK increases by 13.80% of Lucy's ATK + 44, up to a maximum of 600. The Cheer On! status lasts for 10s when a Line Drive is hit, and 15s when a Fly Ball is hit. Repeated triggers reset the duration.

Mindscapes

1
M1
2
M2
3
M3
4
M4
5
M5
6
M6
M1Drill FormationsPull Target

When the guard boars launch Guard Boars: Spinning Swing!, Lucy recovers 2 Energy. This effect can trigger once every 15s, with each guard boar having its own separate cooldown.

Is it worth getting?

Great quality of life for energy sustain.

M2Little Boar CaptainPull Target

When Lucy uses a Chain Attack or Ultimate, it grants all squad members, Bangboo, and the guard boars the Cheer On! status for 10s.

Is it worth getting?

Major efficiency boost for buff uptime via Chain/Ult.

M3Ironfist Overseer

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.

M4Chaos Ball Game

While in the Cheer On! state, allies' CRIT DMG is increased by an additional 10%.

Is it worth getting?

Solid CRIT upgrade — helps hit thresholds and raises personal damage cleanly.

M5Wildland Princess

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.

M6Fierce Fangs of FirePull Target

When an ally in the Cheer On! state hits an enemy with an EX Special Attack, a guard boar will drop from the sky and cause an explosion, dealing Fire DMG equal to 300% of the guard boar's ATK. This will extend the duration of the Cheer On! buff for all squad members by 5s. The duration can increase up to 3 times, with a maximum duration of 30s. Refreshing the Cheer On! state resets the stack count. After the guard boar's explosion, it will launch Guard Boars: Spinning Swing!.

Is it worth getting?

Peak performance, significantly extends buff duration.

Lucy is viable and competitive at M0. First stop: M2. Endgame target: M2.

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