When she was young, Suiren was bullied by the boys who liked her, which made her want to go to an all-girls middle school. However in middle school, even the girls kept on seeking her attention as well. Every time she smiled or spoke, they made a fuss over it, causing Suiren to stop smiling and talking. She then decided to go to a co-ed high school.
Suiren has long light blond/pink hair, with a shorter curved layer to her shoulders. She has very long eyelashes. As described by her so-called rival, Koharu, and has nice pale skin and very long wavy hair. Suiren is very pretty and cute, constantly attracting the attention of both boys and girls. When she goes out, she always wears a cap to hide her face.
Suiren is very quiet, and she rarely speaks or smiles. Although this can also be seen as being shy, this may not truly be the case, as shown when she displays her feelings for Kawasumi, albeit with very simple actions like nodding her head or shaking. Whenever she does speak or smile, the people around her are immediately surprised. Suiren can also be very innocent or naive, but she is very honest with her feelings, such as when she noticed that she was in love with Kawasumi and immediately accepted it. Despite this acceptance, she is unable to tell him what she wants from him or how she feels because she has trouble communicating her thoughts to others.