Sidoh

Bulky layers swallow most of Sidoh's frame, and strips of cloth coil around his head, leaving little of him exposed. Where a face would be, a canary's beak juts out instead of a mouth. His limbs tuck against his torso in a manner Takeshi Obata likened to an insect, and each hand ends in just three fingers. The portable game Death Note: Successor to L tints portions of him brown and red while brightening the wrappings to a crisp white.

A weakness for chocolate defines him, the same fixation Ryuk reserves for apples and a craving he happens to share with Mello. Once Sidoh sets his sights on something, his notebook above all, he refuses to let go, hounding whoever might lead him to it. For all that doggedness, Death Note 13: How to Read brands him a coward, and he cowers before Mello even though the man is merely human.

Running low on the lifespan he has left, Sidoh wants his stolen Death Note back fast. He pesters Ryuk without rest and even resorts to handing out notices to fellow death gods, hoping one of them will track it down. The trail leads to the Mafia, so Sidoh throws in with Mello's crew as they square off against the Japanese Task Force and Near's SPK, the price for getting his property returned. Along the way he lets slip that the rules forbidding a notebook user from killing within set windows are fabrications, handing Mello the insight that Kira invented them to dodge suspicion.

Once Light Yagami wrests the notebook away from Mello, he hands it back to Sidoh rather than risk the death god meddling, a gesture also meant to keep the Task Force on his side. The move backfires. The exposed lie about the false rules travels from Mello to Near and onward to the investigators, who renew their doubts about Light, so Sidoh's brief involvement quietly helps seal Kira's fate.

Beyond the main story, the novelization of Death Note: Light Up the NEW World counts him among six death gods who carry notebooks into the human world; there he latches onto Alexey Ivanov, steering him toward online victims and so-called mercy killings before shifting to Yuki Shien after Ivanov is slain. The 2018 audio drama widens his part, pairing him with L's lingering spirit to recover the lost notebook, which a dying Soichiro Yagami ultimately gives back.