Haruka Yamaoka

Isshin is The Union Negator 6 of Undead Unluck.

Appearance
Isshin's design seems to be based on a traditional Japanese samurai armor called Yoroi. He's also quite bulky in his build.

Isshin's true appearance beneath his armor is unknown.

Personality
Isshin is a quiet and protective person.

Spoil Arc
When Andy and Fuuko join the organization, Andy shoots fingers at each member, but Isshin lets the finger hit him and just moves his hand to protect Phil from the other finger. When Apocalypse reveals the new quests, he along with other members take on UMA Burn quest.

When they captured Spoil, Shen calls for help in stopping Victor and Isshin along with the rest came fight Victor. Isshin slams Victor from behind, making Victor comment that he used only brute strength and if he doesn't fight him, he may let him live. But as they kept fighting, Victor realizes how sturdy Isshin is, as his attacks has no effect on him. Isshin then grabs on of Victor's copies and lets Phil shoot both him and Victor's copy, while burning Victor, but having no effect on Isshin.

Abilities
Unbreakable (不壊): Anything forged by Isshin never breaks regardless of how severe the damage is, obtaining the Unbreakable kanji.
 * Enhanced Durability: Isshin has great durability, resisting victor's attacks without taking damage, also supposing a laser that incinerated one of victor's clones without taking damage

Enhanced Strength: Isshin has great brute strength which corresponds to his great physical size, quoting Victor in half with a blow and cracking the ground beneath him.

Equipment
Samurai Armor

Naginata