Age: 12
Birthday: December 12
Height: 145 cm
Weight: 37 kg
Blood type: AB

The youngest brother who looks up to his older siblings, especially Tenka, who considers himself to be both Chuutarou's brother and parents. He is very naive, cannot fight, and tends to cry easily; however, he is good in tracking down fleeing suspects, laying down traps, and using explosives. He's always accompanied by Gerokichi.

He has a habit of ending his sentence with "ssu."