Shirono Sui

 (城ノすい) is a member and the leader of CURTiA.

Profile

 * Card: ♧2
 * Skills: Flexible shoulders that can move strangely, can play a song on piano immediately after seeing the score
 * Hobbies: Karaoke alone
 * Qualifications: Eiken level 2, Kanji level 3

Trivia

 * She is the youngest member of the group.