Riamu Yumemi (夢見 りあむ Yumemi Riamu ) is a character in the game Idolmaster Cinderella Girls of the series Idolmaster. She is an idol otaku who became an idol herself. Despite being an idol fan hrself, she seems to despise other idol fans.
- In her unidolized card for the song Yume wo Nozoitara, she is shown to be embarrassed of bathing together with Fumika Sagisawa
- Said Yukimi Sajō's quiet trait to be a little bit cute, then admired her loli cuteness.
- She seems to be specifically into female idols, going by the posters in the background of her unidolized card Rising Feeling.
- In a countdown art for Starlight Stage's fourth anniversary, she grabs to Akira Sunazuka and Akari Tsujino as she falls.
- In Shin Satō's unidolized card for the song Go Just Go!, Riamu gets embarrassed as Shin feeds her a strawberry.
- In Nana's unidolized card Dress-Up☆Usamin, Riamu admires her along with Akari and Akira.
- Is shown in a bus with Akira and Akari in Akari's unidolized card Awakened☆Akaringo.
- She is often grouped with Arisa Matsuda from Million Live!, Yuika Mitsumine from Shiny Colors and Minori Watanabe from SideM due to all of them being idol fans.