Natsuki Rio roles (drama)
Rio has done the following roles in audio drama.
| Cinematic Sound Drama GetBackers [CD] | ? |
| Desire [CD] | Sylvia Brother |
| El Hazard [CD] | Jinnai Nanami |
| Himikoden -Renge- [CD] | Suzu |
| Izumi Gensenki -Meidouhen- [CD] | woman |
| Macross 7 CD Cinema [CD] | ? |
| Macross 7 Docking Festival -Uta ha ginga wo sukuu- [CD] {Track 17} | Anita |
| Macross 7 Docking Festival -Uta ha ginga wo sukuu- [CD] {Track 5} | computer voice |
| Macross 7 Docking Festival -Uta ha ginga wo sukuu- [CD] {Track 6,12} | joshikousei |
| Macross 7 Docking Festival -Uta ha ginga wo sukuu- [CD] {Track 5,16} | Miho |
| Macross 7 Docking Festival -Uta ha ginga wo sukuu- [CD] {Track 19} | street voice |
| Macross 7 Docking Festival -Uta ha ginga wo sukuu- [CD] {Track 4} | tourist |