Luka 
Nihility The boxing champion in Belobog's Underworld, and one of Wildfire's most capable fighters. The consecutive reigning champion of the Fight Club, whose enthusiasm inspires children of the Underworld to dream big.
HP
ATK
DEF
SPEEDBleed Debuffer
Best Light Cone
Luka Best Stats
Luka Best Substats
Luka Best Relics
Luka Best Teams
F2P DoT Team
This F2P (Free to Play) Team revolves around Luka and his teammates inflicting various DoT debuffs. Serval will be the DPS who can deal Lightning DMG and inflict Shock DoTs. Asta is also great choice for her SPD buffs and is able to inflict Burn DoTs.
Premium DoT Team
This is Luka's best team that involves the use of DoT. Kafka will be the Main DPS who can trigger DoTs using her Skill and Ultimate. Ruan Mei can increase the party's Break Efficiency and delay an enemy's recovery from Break.
Physical Team
Luka can be used in a team that mostly consist of Physical characters. Silver Wolf is the key party member that can add a Physical weakness if an enemy doesn't have it. If the enemy already has Quantum as one of its base weaknesses, Silver Wolf can guarantee on implanting a Physical Weakness.
Skills
Deals Physical DMG equal to #1[i]% of Luka's ATK to one designated enemy.
Deals Physical DMG equal to #1[i]% of Luka's ATK to one designated enemy target. In addition, there is a #2[i]% base chance to inflict Bleed on them, lasting for #5[i] turn(s). While Bleeding, the enemy will take #3[f1]% of their Max HP as Physical DoT at the start of each turn. This DMG will not exceed more than #4[i]% of Luka's ATK.
The base chance of applying debuffs to targets hit. The final probability is affected by the attacker's Effect Hit Rate and enemy targets' Effect RES.
Receives #5[i] stack(s) of "Fighting Will," with a #2[i]% base chance to increase one designated enemy target's DMG received by #3[f1]% for #4[i] turn(s). Then, deals Physical DMG equal to #1[i]% of Luka's ATK to the target.
The base chance of applying debuffs to targets hit. The final probability is affected by the attacker's Effect Hit Rate and enemy targets' Effect RES.
After Luka uses his Basic ATK "Direct Punch" or Skill "Lacerating Fist," he receives #1[i] stack of Fighting Will, up to 4 stacks. When he has 2 or more stacks of Fighting Will, his Basic ATK "Direct Punch" is enhanced to "Sky-Shatter Fist." After his Enhanced Basic ATK's "Rising Uppercut" hits a Bleeding enemy target, the Bleed status will immediately deal DMG for 1 time equal to #2[i]% of the original DMG to the target. At the start of battle, Luka will possess 1 stack of Fighting Will.
Traces
Eidolon
When Luka takes action, if the target enemy is Bleeding, increases DMG dealt by Luka by
If the Skill hits an enemy target with Physical Weakness, gain
Skill Lv. +2, up to a maximum of Lv.
For every stack of Fighting Will obtained, increases ATK by
Ultimate Lv. +2, up to a maximum of Lv.
After the Enhanced Basic ATK's "Rising Uppercut" hits a Bleeding enemy target, the Bleed status will immediately deal DMG 1 time equal to