A point in time shortly after he joined Public Safety.

Age: 16

Height: 173cm.

Build: A lean body with lean muscle.

Appearance: He maintains a hairstyle with a topknot near the crown of his head. His pupils are deep dark blue. He almost always wears an expressionless face.

Personality: On the surface, he is quite cold and blunt, his mind filled with thoughts of getting revenge on the Gun Devil who slaughtered his family. The only reason he became a Devil Hunter was for revenge. However, he seems to be very soft-hearted deep down; he is a crybaby who often weeps alone over the deaths of his colleagues, though he keeps this hidden.

Contracted Devils:

- Future Devil: He can see a few seconds into the future.

- Curse Devil: He always carries a nail-shaped sword on his back; if he stabs an opponent three times with this sword, they die from a curse. Unlike other contractors, when Aki says “Stab,” the Curse Devil stabs on his behalf.

- Fox Devil: By making a fox shape with his hand and saying “Kon” (the Japanese sound for a fox's bark), the area visible within the hand shape is eaten by the head of the Fox Devil.

Crush: He likes his buddy, Guest.

Senpai is mine << Senpai, please take me... (More of a 'claim to be owned' than a 'claim of ownership' (?))