Hero Association SagaEdit
Alien Conquerors ArcEdit
Iaian accompanied Atomic Samurai to the Hero Association Headquarters in A-City, when it was suddenly demolished by the Dark Matter Thieves. Iaian managed to save a father and child from the the monster Melzalgald. As Iaian was fighting the monster, his left arm was torn off. Feeling hopeless, he was saved by his master and was ordered to stop bleeding. Iaian later observed the fight between Atomic Samurai, Bang, Puri-Puri Prisoner and Metal Bat against the monster. Seeing their attacks do nothing to Melzalgald, Iaian told them to retreat and find a solution to defeat it, but his pleas were ignored.
Human Monster SagaEdit
Super Fight ArcEdit
Bushidrill, Okamaitachi and Iaian and are waiting outside discussing about Garou's hero hunt, while their master Atomic Samurai is attending a meeting with the Council of Swordmasters. After Atomic Samurai killed the monster Haragiri, Atomic Samurai then declared they will strike the Monster Association.