Haley Belle

Because Belle sits so far at the margins, the original manga never grants him a design of his own, leaving him there as just a name listed among the Bureau's agents. Only the adaptations put him on screen, where he shows up as one more suited federal agent flown out to Japan.

Belle is sketched almost purely by function rather than by personality. Numbered within the Bureau contingent of twelve dispatched to vet Japan's police on L's behalf, he stays an anonymous investigator whose individual traits the source leaves largely blank.

Manipulating Raye Penber through the notebook, Light Yagami forces him to record the identities of his fellow Kira investigators, and the other eleven operatives, Belle among them, drop from heart attacks. L reconstructs the killings and ranks the agents two ways, by the sequence in which each received Penber's file and by the sequence in which they perished; Belle tops the first list and falls fifth on the second, dying roughly half an hour after his copy reached him.

Adaptations widen the part. The 2015 drama renames him Henneth Belle, who takes Penber's call for the agents' files, has none himself, and gets the chief to forward them. The stage musical reassigns Penber's entire role to him, with Light tracing his name through details a fiancee had posted online before writing an order that makes Belle slay his colleagues and then throw himself beneath an oncoming train.