Serizawa Yuu (芹澤優) is a member of the Japanese idol group i☆Ris. Her color in i☆Ris is blue.
- Name: Serizawa Yuu (芹澤優)
- Nickname: Yuu-chan
- Birthday: December 3, 1994
- Birthplace: Tokyo, Japan
- Height: 163cm
- [2017.02.10] Kimi to (君と; With You)
- Her favorite anime is Full Moon wo sagashite.
- Hobby: cooking.
- Dream: to be a famous seiyuu and giving concerts around the world.
- Her aunt is Saito Yuki.