Luka — Honkai Star Rail Character Guide

Overview

Single-target DoT/Break hybrid who inflicts Bleed scaling with enemy Max HP and amplifies team damage via Ultimate. Self-procs Bleeds with Enhanced Basic ATK for consistent damage, but strictly limited to single targets and outclassed in endgame.

Single-target Physical Nihility DPS who inflicts Bleed via Skill (24% enemy Max HP, capped at 338% ATK) and self-triggers it with Enhanced Basic ATK. Manages Fighting Will stacks to unlock Enhanced Basic ATK, which delivers 3 Direct Punch hits followed by Rising Uppercut that forces an immediate 85% Bleed proc. Ultimate provides 2 Fighting Will stacks, deals 330% ATK damage, and applies a 20% DMG Taken debuff for 3 turns. Builds around ATK, Effect Hit Rate, and SPD rather than CRIT stats.

Key Mechanics

• Bleed DoT deals 24% of enemy Max HP per turn but is capped at 338% of Luka's ATK. Against high-HP enemies, Break Bleed (which scales with Break Effect instead) can eventually exceed Skill Bleed damage.
• CRIT stats are worthless — all meaningful damage comes from Bleed DoT and Break Bleed, neither of which can critically strike. Stack ATK, Effect Hit Rate (67% threshold), SPD, and Break Effect instead.
• Enhanced Basic ATK forces a Bleed proc via Rising Uppercut, allowing Luka to frontload DoT damage rather than waiting for turn-start ticks. This is the primary reason Kafka synergy is so strong — she triggers these Bleeds again externally.
• The 20% DMG Taken debuff from Ultimate lasts 3 turns and benefits the entire team's damage, making Luka function as a hybrid DPS/debuffer.
• In Physical-weak content, both Skill Bleed and Break Bleed can be active simultaneously on the same target, doubling the value of Bleed trigger effects from Kafka or Rising Uppercut.

Best Teams for Luka

DoT Trigger

Pairs Luka with Kafka to repeatedly activate his Bleeds for massive damage. Kafka's Skill and Ultimate trigger all active DoTs on all enemies, and in Physical-weak content both Skill Bleed and Break Bleed can be active simultaneously for double triggers. Each trigger deals 24% enemy Max HP (capped at 338% Luka ATK), so increasing trigger frequency is the primary damage lever. E6 Luka adds up to 48% extra Bleed procs per Enhanced Basic cycle that Kafka also triggers. Jiaoqiu adds a third DoT source and a DMG Taken debuff.

• A-tier: Luka, Kafka, Jiaoqiu, Huohuo
• B-tier: Luka, Kafka, Sampo, Gallagher

Physical Break

Focuses on Physical Break Bleeds rather than Skill Bleeds. Break Bleeds scale with Break Effect rather than being capped at 338% ATK, so they outscale Skill Bleeds against high Max HP targets. Fugue enables consistent Super Breaks and repeated Physical Breaks through Exo-Toughness, while Ruan Mei increases Break Efficiency and extends Break windows. Can also include Boothill — his higher Break Effect stat generates stronger Break Bleeds, and Luka triggers them with Enhanced Basic ATK. Luka's 20% Ultimate debuff amplifies all Break damage.

• B-tier: Luka, Tingyun • Fugue, Ruan Mei, Gallagher
• A-tier: Luka, Boothill, Tingyun • Fugue, Gallagher

Best Teammates

DPS Partners: Kafka (S+), Boothill (C), Black Swan (A), Sampo (C)

Amplifiers: Tingyun • Fugue (C), Silver Wolf (A), Jiaoqiu (S+), Ruan Mei (B), Robin (B), Pela (C)

Sustains: Huohuo (S+), Gallagher (A), Luocha (B), Fu Xuan (B), Aventurine (C)

Investment Priority

1. E4 — Permanent 15-20% ATK buff from Fighting Will stacks scales both Bleed cap and Break Bleed damage — most impactful eidolon per cost for Luka.
2. E1 — Consistent 15% DMG bonus whenever Luka acts against a Bleeding target, active for virtually every action in his rotation.
3. E6 — Substantially increases Bleed procs per Enhanced Basic ATK cycle, providing largest single damage spike — but only meaningful in DoT teams with Kafka.

Best Relics

Recommended: prisoner-in-deep-confinement with revelry-by-the-sea

Stat targets: Effect Hit Rate 67%, SPD 134 / 143 / 160, ATK 2400-2800+, Break Effect 0-120%

Main stats: Body: Effect Hit Rate / ATK% · Feet: SPD · Sphere: Physical DMG / ATK% · Rope: Break Effect / ATK%

Important Notes

• Strictly single-target with no AoE capability — largely useless in Pure Fiction and weak in multi-target Memory of Chaos phases before the boss.
• Skill Bleed capped at 338% ATK at max level — against very high Max HP enemies, Break Bleeds eventually outscale Skill Bleeds, but require Break Effect investment to reach those values.
• Outclassed by modern DPS characters in all endgame modes at current patch — viable with proper partners but not meta for competitive clears.
• A2 dispel only removes 1 buff per Skill, making it unreliable against enemies with multiple self-buffs.