Yutaka Itazu, nicknamed "Panties" or "Pantsu" after his only pair of trousers blew away while drying, plunged into reclusive isolation. This incident caused him to drop out of university and live as a NEET for roughly two years, confined to his small apartment and refusing visitors. Despite this withdrawal, he possessed formidable hacking skills, once recognized and feared as a prodigious talent. His expertise included advising on the advanced Eden image recognition search engine.

His life changed upon encountering Akira Takizawa, drawing him into the Eden group and out of seclusion. As part of the team, his hacking became critical. He accessed and analyzed the specialized cell phones of Seleção participants, including Takizawa and the deceased Yūsei Kondō, uncovering vital information within the Seleção request database. During this investigation, he discovered a plan to launch sixty missiles against Japan. Before he could warn Takizawa, antagonist Daiju Mononobe deliberately ran him over. Severely injured and hospitalized, Itazu successfully transmitted the entire Seleção database to the Eden team before the attack. After recovery, he integrated fully into the Eden group, contributing his technical skills to their operations.

Itazu appears throughout the official media: the original 11-episode television series and the films *The King of Eden* and *Paradise Lost*. While the films depict his continued collaboration with Eden, specific plot contributions within *Paradise Lost* are not detailed. His character development shows a shift from an isolated NEET to a valued team member utilizing his talents alongside the Eden group.