Isui Sui

 (以翠すい) is a former founding member of Poetreep.

CD-R Singles

 * 1) [2022.04.22] Kimi ni Kimeta!! (キミに決めた！！; I Chose You!!)

Mini Albums

 * BIOTOPE
 * Δ

Digital Singles

 * Kazoete, Manabuiwa.

Demo Singles

 * Bad End
 * FUTURE IS MINE

CD-R Singles

 * Kimi to
 * Trinity Dive (Cover)

Singles

 * Yuunagi, Musaishoku, Tooi Hi no Yume. ft. Poetreep

Trivia

 * She is left-handed.