Ryouko has done the following roles in anime.

AKB0048 [2012-2013]	5th Takahashi Minami
Amagi Brilliant Park [2014]	Macaron
Aquarion Logos [2015]	Soda Sakurako
Asta Rotte no Omocha [2011]	Helga
D.C. -Da Capo- [2003]	Mikkun
Fight Ippatsu Juuden-chan [2009]	Akita Misora
GetBackers [2002]	young Ginji
Hatsukoi Limited [2009]	Watase Meguru
Hayate no Gotoku [2009]	Ayasaki Hayate
Hayate no Gotoku Can't Take My Eyes Off You [2012]	Ayasaki Hayate
Hayate no Gotoku Cuties [2013]	Ayasaki Hayate
Heartcatch PreCure [2010]	Mizushima Aya
Koyomi Monogatari [2016]	Kagenui Yozuru
Love Live Nijigasaki Gakuen School Idol Doukoukai [2020-2022]	Nana's mother
Mahou Shoujo Lyrical Nanoha [2004]	Takamachi Miyuki
Mahou-sensei Negima (TV) [2005-2006]	Nagase Kaede (20)
Mahou-sensei Negima Anime Final [2011]	Nagase Kaede (20)
Natsu no Arashi [2009]	Arashiyama Sayoko
Noein	Tobi
Nyan Koi! [2009]	Sumiyoshi Kanako
One Piece [1999-]	Akibi
Oniichan no Koto Nanka Zenzen Suki Janain Dakarane [2011]	Kusuhara Hirono
Piano no Mori [2018]	Ichinose Kai (young)
Saki [2009]	Someya Mako
Saki Achigahen [2012]	Someya Mako
Senran Kagura [2013]	Hikage
Shakugan no Shana [2005-2006]	Sorath
Sky Girls [2007]	Hayami Takumi
Sore ga Seiyuu [2015]	Shiraishi Ryouko
Soredemo Machi ha Mawatteiru [2010]	Haribara Harue
Sword Art Online [2012]	Yuriel
Tenjou Tenge [2004]	Chiaki Kounoike
Working [2011-2015]	Takanashi Kazue
Xenosaga: The Animation [2015]	Mary
Yuru Yuri [2011-2012 2015]	Nishigaki Nana
Zettai Karen Children [2008]	Nogami Aoi