Saki is a first years student at Miyamasuzaka Girls Academy. She's the keyboardist of Leo/need. She's childhood friends with her fellow band members.

Saki was born with a weak body. Because of her weak body, she could not attend middle school. Her older brother, Tsukasa, took care of her during that time. However, she became healthy enough to attend high school. Saki was childhood friends with Ichika, Honami and Shiho. Due to an incident at the school, their relationship became strained.

Saki is a cheerful, bright mood-maker who tries her best to never stops smiling. She is the younger sister of Tsukasa, and seems to take a liking to gyaru styles and subculture. As a child, Saki would often miss out on large amounts of school due to her sickly condition, at one point becoming homeschooled for a period of time. During her childhood years of isolation, Saki would often experience feelings of loneliness, sometimes entering states where she could not bring herself to smile despite her brother's best efforts. Due to being hospitalized for such a long time, she has become determined to live life to fullest and not miss out on anything. However, due to this desire, she can sometimes ignore her own limits and neglect her health, a habit she is working on getting rid of.

Saki has a mid-highish range voice with alot of energy behind it.