Soyo is a very kind and mature girl 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 or planning something. Although not outwardly hostile, Soyo can be quite cunning at times. Deep down Soyo has a hard time letting go of the past and moving forward, especially in regards to her former band. A part of her selfishly clung to the idea that CRYCHIC still hadn't actually broken up, as sh