Hideki Ide

Ide wears his black hair in a short crop above small, light-colored eyes, and notably has no eyebrows. His usual outfit is a green blazer over a white shirt with a red tie.

Ide is short-tempered and has little tolerance for foolishness, reserving particular irritation for the antics of Touta Matsuda. His defining bond is with Shuichi Aizawa; the two sustain each other after walking away from the investigation and stand together when it counts. Wary of L from the outset, he refuses to commit to the team while the detective leads it and only signs on fully once Light Yagami inherits the role. Later, as suspicion grows that Light himself may be Kira, Ide quietly backs Aizawa and shields him.

Ide is part of the original Kira Investigation Team, a large body that thins to just six members once it becomes clear Kira will kill the police pursuing him as readily as criminals. When L insists on meeting the remaining detectives in person, Ide's distrust wins out and he turns his back on his colleagues, walking away. He is soon joined in his exile by Aizawa, who also breaks with L. The two prove they never truly quit: when Kyosuke Higuchi is unmasked as the Yotsuba Kira and the police are warned to keep their distance because of his Shinigami Eyes, Ide and Aizawa defy orders, leading a column of squad cars with tinted windows and face-concealing helmets to box Higuchi in and force his surrender, all enabled by an investigation they had been running on their own.

After L dies and Light assumes his identity, Ide rejoins the team in full as the Near and Mello arc opens with the kidnappings of Kanichi Takimura and Sayu Yagami. He is present in the Yellow Box warehouse when Near finally exposes Light as Kira. A year on, talking it over with Matsuda, Ide remains firm that bringing Kira down was right regardless of the means, since otherwise everyone who opposed him would eventually have been killed. He also features in the stage musical as a task force member who chooses to resign, and he holds the distinction of being the only member of the group absent from the live-action films.