Sidoh wears heavy clothing, obscuring most of his features, and his head is wrapped in bandages. He shares Mello's great liking for chocolate, similar to Ryuk's liking of apples. Sidoh is fairly timid; Mello frightens Sidoh, despite the fact that Mello is a human. "Death Note 13: How to Read" describes Sidoh as unintelligent and forgetful, rarely remembering the names of other Shinigami. After Light regains the Death Note from Mello, he returns it to Sidoh to keep him from interfering.