
Quick answer — Rio Okano worked on Kase-san and Morning Glories (Music), Children of the Whales (Theme Song Performance), Ulysses: Jeanne d'Arc and the Alchemist Knight (Theme Song Performance) and 2 more anime.
Rio Okano worked on Kase-san and Morning Glories (Music), Children of the Whales (Theme Song Performance), Ulysses: Jeanne d'Arc and the Alchemist Knight (Theme Song Performance), Fragtime (Music), Maerchen Maedchen (Music).