Tesshu Isshin

""We'll stake our lives on this gamble!! If you really do embody misfortune... then go ahead and lose to me!!""

Tesshu Isshin (一心 鉄舟) is a Negator who lived in the past who wielded the ability Unbreakable. He is referred to as The First by his descendants.

Etymology

 * The name Tesshu means "iron" (鉄) (tes) and "boat, ship/shipping, vessel, watercraft, steamship" (舟) (shu).
 * Tesshu's surname Isshin means "single-minded/mind" (一心).