| Cast list |
| Youko Honna | as | Shizuku Tsukishima (voice) |
| Kazuo Takahashi | as | Seiji Amasawa (voice) |
| Takashi Tachibana | as | Yasunari Tsukishima (voice) |
| Shigeru Muroi | as | Asako Tsukishima (voice) |
| Shigeru Tsuyuguchi | as | The Baron (voice) |
| Keiju Kobayashi | as | Chikyu-Ya' shujin (voice) |
| Deanna Russo | as | High School Student |
| Minami Takayama | as | Kosaka-sensei (voice) |
| Yorie Yamashita | as | Shiho Tsukishima (voice) |
| Mayumi Iizuka | as | Kinuyo (voice) |
| Toshio Suzuki | as | (voice) |
| Mika Boorem | as | Kinuyo (voice: English version) |
| Erin Chambers | as | Additional Voices (voice: English version) |
| Suguru Egawa | as | (voice) |
| Cary Elwes | as | The Baron (voice: English version) |
| David Gallagher | as | Seiji (voice: English version) |
| Harold Gould | as | Nishi (voice: English version) |
| Naohisa Inoue | as | Tall friend of Mr. Nishi (voice) |
| Shirô Kishibe | as | (voice) |
| Abigail Mavity | as | Nao (voice: English version) |
| Tatsuya Okada | as | (voice) |
| James Sikking | as | Seiya (as James B. Sikking) |
| Jean Smart | as | Asako (voice: English version) |
| Brittany Snow | as | Shizuku (voice: English version) |
| Martin Spanjers | as | Sugimura (voice: English version) |
| Issei Takahashi | as | Seiji Amasawa |
| Satoru Takahashi | as | (voice) |
| Courtney Thorne-Smith | as | Shiho (voice: English version) |
| Ashley Tisdale | as | Yuko (voice: English version) |
| Hiromi Yasuda | as | (voice) |
