Full Cast - Mr. Happy (OVA) (episodes 1 to 3)
- 1. Here Cums Mr. Happy
Recurring: Barbara Goodson (Manchio), Wendee Lee (Kikumaru)
Incidental: Carl Macek (Train Announcement), Melora Harte (Bather 6, Prostitute 1), Steve Kramer (Finger 1, Councilman)
Unidentified roles: Bather 2, Secret Clam, Bather 3, Bather 1, Prostitute 3, Prostitute 2, Mermaid, Hostess, Finger 2, Bather 5, Bather 4
- 2. Mr. Happy Cums Again
Recurring: Kerrigan Mahan (Mr. Makihara), Melora Harte (Mary)
Episodic: Milton James (Mr. Yamashiro)
Incidental: Carl Macek (Bathhouse Employee), Jerry Beck (Passerby 3), Steve Kramer (Toe, Passerby 2)
Unidentified roles: Passerby 1, Passerby 4
- 3. Mr. Happy Bites the Big One
Recurring: Edie Mirman (Mistress Jane), Joyce Kurtz (Tomayo)
Episodic: Bill Capizzi (Kimpei), Brianne Siddall (Yuka), Carl Macek (Hotel Employee)
Incidental: Bill Capizzi (Kimpei's Mr. Happy), Carl Macek (Thug 2), Joyce Kurtz (Secret Clam 1), Melora Harte (Shina), Steve Kramer (Finger, Thug 1, Train Announcement)
Additional Voices: Melora Harte
Unidentified roles: Sister Yusui, Madame, Thug 1's Mr. Happy, Hito, Clam Airways Announcement, Barkeep, Aisuke's Mr. Happy, Third Knocker, Secret Clam 2