Isshin Yamaoka

Isshin is member no. 6 of the Round Table. They are a Negator with the alias Unbreakable. Isshin's design seems to be based on a traditional Japanese samurai armor called Yoroi. They are also quite bulky in their build. Isshin's true appearance beneath their armour is unknown. Isshin is a quiet and protective person.

(Source: Undead Unluck Wiki)