Rebecca

Quick Verdict

Build Rebecca because she is free. She is Lucy's main sub-DPS, and every tested Lucy team uses her. Her second proven role is as a free Xuanling sub-DPS, and in principle she can support any Heavy Attack carry. Her S0 kit is complete and her tested teams perform well. She is role-dependent rather than dependent on a rare partner: Heavy Attack damage is the requirement, while Lucy is simply the character who uses her full package best.

Rebecca's meaningful team sequence is S2; S3 is her largest personal damage jump. Her signature weapon is useful but not required, and the standard 5-Star pistol is enough for a strong free setup.

How Rebecca Works

Huntress and Guts

Rebecca has two combat modes. Huntress grants 30% Crit DMG, while Guts lets her ignore 15% of the target's DEF. She switches mode whenever she uses her Resonance Skill or Intro and starts in Huntress by default. A standard rotation begins with an Intro that puts her in Guts, then one Resonance Skill returns her to Huntress before she leaves the field.

Fervor and the Forte Heavy Attack

Fervor holds up to 120 points. Basic Attack and Resonance Skill hits build it, while the Intro's A Girl Gets What She Wants! grants 50 points. At 120, her Heavy Attack becomes Rat-tat-tat!: Huntress or Bang-bang-bang!: Guts. The barrage pulls nearby enemies inward, consumes all Fervor, deals Basic Attack damage, and generates Concerto Energy. In the tested rotation, hold and release Heavy Attack at the listed point.

Hot Hand

Hot Hand also holds up to 120 points, regenerates 10 points per second, and gains 40 points from the Forte Heavy Attack. Using an Intro or Resonance Skill at 120 triggers A Girl Gets What She Wants! for 12 seconds. Rebecca receives both mode bonuses at once while Hot Hand drains and cannot be refilled. It naturally refills between rotations, so her Intro triggers the state each time; the Intro's 50 Fervor also shortens later rotations.

Resonance Liberation and Outro

Party 'til Dawn! mounts the Mk. 31 HMG for up to 9.5 seconds. Every hit counts as Basic Attack damage, and timed Normal Attack or Liberation inputs build Overload up to 90 and enhance the fire. Rebecca is immobile during it but receives 50% damage reduction and interruption immunity. At the end or at maximum Overload, BOOM! Fireworks! fires automatically; holding Liberation ends it early, while leaving early removes the accumulated Overload. The tested input ends the Liberation and immediately uses Outro so the finisher lands as Rebecca leaves. Her Inherent Skill also gives the team 20% ATK for 30 seconds when she casts the Liberation.

Her Outro leaves Preem Choom for 14 seconds and grants Edgerunner Bonds to the incoming Resonator for 14 seconds: 15% All DMG Amplification, plus Overlimit stacks every 0.2 seconds that add 0.5% Heavy Attack DMG Amplification each, up to 35%. A normal carry needs the full 14 seconds to reach 35%, so early hits receive less. Lucy receives the maximum instantly and enhances the turret to 250%, but the duration becomes 4 seconds. Edgerunner Bonds ends when its holder swaps, so it is not compatible with quick-swap play.

Hack interaction

Rebecca's Intros, Forte Heavy Attack, and BOOM! Fireworks! inflict Hack - Shifting. When a teammate's Tune Break inflicts Hack - Interfered, Rebecca answers from off-field with Hack Response - Meltdown, once per target every 8 seconds. Her Inherent Skill also gives a teammate who inflicts Hack - Shifting 30 Tune Break Boost for 30 seconds. The tested Lucy and Mornye variant can trigger Meltdown twice in its second rotation: once after Rebecca's Intro and once near the end of Lucy's field time. Lucy can inflict Hack - Shifting too.

Tested rotations

First rotation — about 9.6 seconds:

Intro > Echo > Basic 1, 2, 3 > Skill > Basic 1, 2 (hold Heavy at the end of Basic 2) > Heavy Attack (press and release) > Liberation > Outro

Later rotations — about 7.9 seconds:

Intro > Echo > Basic 1, 2, 3 > Skill > Heavy Attack (hold and release) > Liberation > Outro

The later rotation is shorter because the Intro provides 50 Fervor. In the Lucy and Mornye two-trigger variant, insert Tune Break after Rebecca's Intro in the second rotation only when Off-Tune is ready; the rest stays the same.

Build Priorities

Rebecca's tested damage profile is Basic Attack 64.62%, Tune Break 24.81%, Intro 4.03%, Resonance Skill 3.52%, Echo 1.58%, and Outro 1.44%. Both the Forte barrage and HMG count as Basic Attack damage. Heavy Attack buffs on Rebecca herself are therefore wasted.

Substats: Crit Rate > Crit DMG > ATK% > Basic Attack DMG Bonus > Energy Regen.

Talent levels: Normal Attack, Forte Circuit, and Resonance Liberation to Level 10; Resonance Skill and Intro to Level 6.

Echo setup: 1-piece Shadow of Shattered Dreams, whose Hack - Shifting condition grants 35% Basic and Heavy Attack DMG Bonus for 15 seconds; 2-piece Void Thunder for 10% Electro DMG Bonus; and 2-piece Reel of Spliced Memories for 10% ATK. Use Reminiscence: Nightmare: Adam Smasher as the main Echo. In a Lucy and Rebecca team it grants 15% Crit Rate and provides a multi-hit Echo attack.

The page's tested main-stat comparison is Crit Rate Cost 4 with two Electro Cost 3 at 100%, ATK / Electro at 97.50%, and Crit DMG Cost 4 at 84.62%. Rebecca is already saturated with Crit DMG, targets roughly 303%, and gains Crit Rate from Adam Smasher, so do not use a Crit DMG Cost 4.

Weapons: Skull Thrasher R1 is the 100% baseline, R5 reaches 118.35%, and Static Mist R1 reaches 84.62%. Skull Thrasher is her signature team weapon: after Hack - Shifting, it gives the team 24% ATK for 30 seconds at R1. It is strong but skippable. Static Mist supplies Energy Regen and passes ATK through Outro, making it a practical standard-banner option. Do not reduce Rebecca to a pure buffer; her personal damage share is what separates her from Mortefi.

Team Fit & Account Value

Lucy + Rebecca + Shorekeeper or Mornye is Rebecca's main home. Rebecca gives Lucy 15% All DMG Amplification and the instant maximum 35% Heavy Attack DMG Amplification, matching Lucy's tested 77.70% Heavy Attack damage profile. Lucy in return gives Rebecca 25% Basic Attack DMG Amplification, matching Rebecca's 64.62% Basic Attack share, plus 20% All DMG Amplification through Countermeasure Program when Hack - Shifting is present. Their mechanics are built to feed each other.

Xuanling + Rebecca + Suisui or Chisa is her proven secondary use. Rebecca amplifies Xuanling's tested 87.32% Heavy Attack share and contributes roughly 20%–23% of team damage herself. Xuanling's strongest tested team remains Xuanling, Chisa, and Suisui, so the Rebecca variants are lower; their account value is that a free Rebecca can release Chisa or Suisui for another team.

In principle, other Heavy Attack carries can use her, but opportunity cost matters. Mortefi and Iuno already compete for that role, and Rebecca variants for Jiyan or Augusta are not presently tested here. Do not build her for an untested pairing alone. Her tested Rebecca teams are strong, and she contributes much more personal damage than Mortefi.

Her limits are clear. A non-Heavy carry receives none of the Overlimit portion. A normal Heavy carry averages less than the 35% ceiling because the buff ramps over 14 seconds. Edgerunner Bonds disappears on swap. Her full Hack interaction also needs Tune Break plus Hack - Interfered, which Lucy currently supplies best. Rebecca is a specialist with one exceptional best friend, not a universal sub-DPS.

The live Team DPS section below the build data contains the current validated Rebecca teams and their exact rotations; use it for the latest comparison rather than treating this review's team overview as a frozen ranking.

Sequence Value

Rebecca is complete at S0. Her personal damage chart is S0 100% → S1 105% → S2 122% → S3 154% → S4 169% → S5 178% → S6 196%. Read that chart alongside her role: S2 is the only early node with major team value, while S3 is the largest personal jump.

• S1 — Try Not to Get in the Way! (3/5): Raises the multipliers of the listed Basic, Heavy, Tactical Dodge, and Dodge Counter attacks by 50%. A Girl Gets What She Wants! also grants Street Smarts stacks that can refund Stamina on Tactical Dodge, and BOOM! Fireworks! gains interruption immunity. The chart reaches 105%; useful personal damage and comfort, not a team breakpoint.
• S2 — Oh, Hey Choom! (5/5): Intro or Liberation grants the whole team 20% All-Attribute DMG Bonus for 30 seconds, and any teammate who inflicts Hack - Shifting gains 15% All DMG Amplification for 30 seconds. The chart reaches 122%. This is Rebecca's team-value stopping point.
• S3 — Don't Sweat Your Six! (4/5): Raises the Liberation and BOOM! Fireworks! multipliers by 60%, expands the Liberation's explosion range by 30%, and makes Intro grant 120 Hot Hand. The chart jumps to 154%, Rebecca's largest personal increase.
• S4 — Got Ya Covered! (3/5): Increases the copied mode bonuses from A Girl Gets What She Wants! by 60%: Huntress's 30% Crit DMG becomes 48%, and Guts's 15% DEF ignore becomes 24%. The chart reaches 169%.
• S5 — Dreamin' on the Edge (2/5): Inflicting Hack - Shifting grants 20% Basic Attack DMG Bonus for 8 seconds. The chart reaches 178%; a small personal step.
• S6 — Maybe, Just Maybe... (5/5): Increases Basic Attack DMG Bonus from every source by 40%, adds a 900% ATK hit to the Forte Heavy Attack, restores extra Hot Hand, adds a once-per-10-minute survival effect, and restores Fervor out of combat. The chart reaches 196%. It is a large personal capstone, not a necessary team upgrade.

Practical stopping points: S0 for the complete free character, or S2 for the main team upgrade. Continue only for Rebecca's personal damage, with S3 as the first meaningful target.

Pull Value

Rebecca is distributed for free, so there is no normal S0 pull decision. The real choice is whether her build deserves account resources and whether later sequences are worth pursuing.