Iron Fist

Iron Fist (アイアンフィスト, Aian Fisuto) is a gang located in N-City. It is N-City's biggest gang.

Psychic Sisters Arc
Iron Fist holds Erika hostage and lures Feather out to fight them. Feather manages to defeat a few of the gang members but is also beat down in the process. Before their leader, Big Iron, can finish the hero off, Tatsumaki sends Saitama flying through the wall and knocks out Feather. Saitama punches Big Iron, and Tatsumaki incapacitates the remaining gang members.