A first-year high school student who is in charge of the contrabass at her school's brass band. Soyo has a very kind and mature personality, and she is often compared to an older sister. Due to this, she is often relied on by her peers. She has a habit of fiddling with her fingertips when she's thinking. She was the bassist of CRYCHIC.(former) Although she looks gentle and kind on the outside, if you spoil she, she will become extremely scary and violent. She is 16 years old.