Matsui

Matsui is one of the main characters of Pumpkin Night series. He is the detective working on the case of the pumpkin night asking kazuya makino with his assistant Hayakawa who disguises herself as Pumpkin Night to lure out Kazuya for questions. Matsui correctly deuces as the pumpkin mask for naoko at middle school was intentionally disfigured for their sadistic amusement.

during the events of Part 1 after Kazuya becomes the Pumpkin Night and Hayakawa going rogue after Mayor Kukori and his son Matsui manage to injury hayakawa. Enraged by this event he witness kazuya after killing Naruto and put him into a pysche ward. He has heard of a new pumpkin night killings all bullies and courrpt people went to check the grave of Naoko completely empty and discovered naoko herself who is now alive again and chased after her.

Matsui would later found an empty house and later meets a talking dog leaves. Mutsui discoveres that Ryuichi Higa was the one who owned the dog and mansion was the one who saved Naoko from Death.