Cast (in credits order)
| Michael Johnston | ... | Akuma Kun | |
| Toshio Furukawa | ... | Mephisto II / Mephisto III (voice) | |
| Rest of cast listed alphabetically: | |||
| Chedi Chang | ... | Mio Kazama (voice) | |
| Lexi Fontaine | ... | Hyakume (voice) | |
| Ren Hanami | ... | Adelina | |
 |
Hiroshi Iwasaki | ... | Satoru Ei (voice) |
|
|
Sakura Kawaguchi | ... | Announcer (voice) |
| Tetsu Shiratori | ... | Shiba (voice) | |
|
|
Toshiharu Yajima | ... | Yuji Nakayama (voice) |
Art Department
| Keizô Kusakawa | ... | storyboard artist |
Additional Crew
| Matthias Klages | ... | voice dubbing |
| Ryan P. McCabe | ... | scheduler (english version) |
| Abbey Veffer | ... | production assistant: Iyuno USA |