A normal girl that gets pulled into the world of the Zerozaki Clan after meeting human puppets. She later is forced to face a puppet, and awakens her affinity for killing. Iori was a normal person, though she'd feel the need to run away from her problems. Once she awakened her innate nature to kill others, she began to stop running away from her problems, as they'd just come find her anyway.

Spoiler

After getting involved with Soushiki Zerozaki, she lost both of her hands. Furthermore, she decided to join the Zerozaki clan, and declared herself as, "Maiori Zerozaki." She later gets mechanical hands to replace her severed ones, now wielding Suicidal Tendencies, and works together with Hitoshiki.