| Kokoro Library lies nestled in an unpopulated mountain far away from town. Three sisters, Iina, Aruto and Kokoro, call the library home and run it from day to day. Kokoro is just beginning her adventures at the library. Will she be become a full-fledged librarian? Will the remote library ever attract readers? Kokoro tries her best to make her dreams come true at Kokoro Library, a place where miracles can happen. |
| Name | Character | Episodes |
|---|---|---|
| Miyuki Sawashiro | Iina (voice) | 12 |
| Chiwa Saito | Kokoro (voice) | 12 |
| Tomoko Kaneda | Akaha Okajima (voice) | 8 |
| Fumihiko Tachiki | Inspector Kajihara (voice) | 3 |
| Keiji Fujiwara | Funny Tortoise (voice) | 3 |
| Yumi Touma | Marie Momochi (voice) | 2 |
| Satomi Korogi | Hikari Inoue (voice) | 2 |
| Satsuki Yukino | Sarara Saeki (voice) | 1 |
| Miyuki Sawashiro | Kokoro Shindou (voice) | 1 |
| Kenichi Suzumura | Kameyan Aigame (voice) | 1 |
| Maaya Sakamoto | June (voice) | 1 |
| Maaya Sakamoto | July (voice) | 1 |
| Nobuo Tobita | Misato's Dad (voice) | 1 |
| Fumihiko Tachiki | Kajihara (voice) | 1 |
| Satomi Korogi | Akari Inoue (voice) | 1 |
| Kozo Shioya | General Momochi (voice) | 1 |