Natsuki Rio roles (anime)
Rio has done the following roles in anime.
| Aika [1997-1999] | White B |
| Aika [1997-1999] | White Delmo N |
| Air Master [2003] | Seriguchi Tomiko |
| Battle Athletess Dai Undoukai | Kanzaki Akari |
| Bubble Gum Crisis Tokyo 2040 | Linna |
| CLAMP Gakuen Tanteidan {Episode 1} | girl A |
| Digimon Adventure 02 | Inoue Miyako |
| El Hazard | Jinnai Nanami |
| Fighbird [debut] | ? |
| Full Metal Panic! [2001] | Kagurazaka Eri |
| Gankutsuou | ? |
| Gankutsuou | Michelle |
| Geneshaft | Sybil |
| Geneshaft | Ryoko Burning |
| Geneshaft | Gloria |
| GetBackers [2002] | Heaven |
| Hi no Tori TV {The Future} | female |
| Hikari to Mizu no Daphne -Daphne in the Brilliant Blue- [2004] | Yukari's mother |
| Hyper Police {Episode 16} | Shimoda |
| K-On Movie [2010] | Yui's mother |
| Kaikan Phrase | Yumi |
| Kishin Taisen Gigantic Formula [2007] | Mizoguchi Michiru |
| Macross 7 | Miho |
| Might Gaine | Audrey |
| Misutenaide Daisy | Tami |
| Princess Minerva | Orlin Carrie |
| Samurai 7 [2004] | Waarya |
| Samurai 7 [2004] | Waarya |
| SD Gundam Gaiden Seikihei Monogatari | Matilda |
| Shadow | Karyuu |
| Shingetsutan Tsukihime | female newscaster |
| Shugo Chara! [2007-2009] | Sanjou Yukari |
| Shura no Toki | Waarya |
| Yuki no Joou (The Snow Queen) | Kai |
| Yuki no Joou (The Snow Queen) | Kai |