Iron

is a member of the Knights of the Purple Smoke.

Appearance
Iron is a large man that wears the outfit of the Knights of the Purple Smoke.

Abilities
Iron's body can withstand being shot at by bullets with ease.

Operation Nether Investigation arc
Upon the Special Fire Force Company 2 and Company 8 entering the Netherworld, Iron confronts Takehisa Hinawa and Takigi Oze.