Yousuke Moriguchi

Yousuke is a concerned father whose characterization is primarily shaped by Satoshi's disappearance.

The OVA focuses more heavily on the children and the investigation, leaving relatively little independent material about Yousuke's interests or professional life.

Yousuke has no established supernatural abilities, combat techniques, or investigative training.

His role is that of a civilian parent involved in a missing-child case rather than an active detective.

Yousuke becomes connected to the investigation after Satoshi disappears. The boy's friends seek help, eventually bringing Conan and Heiji into the search.

Clues left through Satoshi's habits and knowledge of Osaka allow the detectives to trace where he has gone and why he has not returned.

The investigation reveals that Satoshi encountered two bank robbers at an old building and was held captive because he had seen them. Conan and Heiji eventually locate the hideout and rescue him.

Satoshi Moriguchi is Yousuke's seven-year-old son.

Yoshiko Moriguchi is Yousuke's wife and Satoshi's mother.

Conan Edogawa and Heiji Hattori become involved in finding Yousuke's missing son.