Characters in Ufo Baby :[]
Main Characters :[]
 |
 |
| Miyu Kozuki | Kanata Saionji |
 |
 |
| Ruu | Wannya |
Supporting Characters :[]
- Pepo
- Miki Kōzuki
- Yū Kōzuki
- Hōshō Saionji
- Hitome Saionji
- Miu Saionji
- Christine Hanakomachi
- Momoka Hanakomachi
- Kurita Hanakomachi
- Santa Kurosu
- Nozomu Hikarigaoka
- Aya Konishi
- Nanami Tenchi
- Miss Mizuno
- Principal
- Mikan Yamamura
- Mizuki Yamamura
- Akira Kijyou
- Seiya Yaboshi
- Rui Yaboshi
- Teru Moroboshi
- Durian
- Kiwi
- Guava