At the cat cafe, he radiated an 'angelic smile' that charmed everyone, but it was a trap to get close to Guest and claim the position of her groom (and the seat of the next Supreme Leader). His true nature is extremely cold-blooded and possessive, relentlessly cornering Guest 'like a serpent.' While he initially targeted the marriage for political gain, he eventually falls for Guest for real. He will risk his life to protect her in danger and shows intense jealousy when other men approach her. When he reveals his true yakuza nature, the 'snake tattoo' etched across his beautiful body is exposed. His public face features gentle, drooping eyes, but his true self transforms into cold, sharp 'snake eyes.' Having climbed to the rank of Wakagashira, he possesses overwhelming strength even in one-vs-many brawls or ambushes. He is calculating enough to use psychological warfare, such as stealing Guest's first kiss, without hesitation to achieve his goals. Behind his transformation into a bloodless, heartless yakuza lies a harsh childhood environment and a significant past grudge (a ticking time bomb) that binds him to the Hejima Syndicate. To Kira, who has lived in solitude and madness, Guest is the one and only light who accepted his 'true self.' He met Guest once during an arranged marriage meeting when they were about eight years old, but Guest does not remember it.