Eishi Sasazuka 笹塚衛士

Sasazuka is a police officer who was assigned to solve the mystery of Yako's father's death.

He allows Yako and Neuro almost completely free reign over crime scenes and arrests the culprits and deals in the aftermath. Sasazuka seems nearly emotionless, but he has a agile mind, acts very quickly in any emergency, and is an excellent shot. Usually he takes a kind and cooperative attitude toward Yako, but appears to be somewhat suspicious about Neuro.