Shion Sumeragi

Nicknamed "Shii", Shion is a recognized genius who comes from a family of geniuses. She has purple hair and eyes and has a low body temperature. She has many brothers, one who is a chef, one who is a pianist, and another who is a barista. Although she is a genius she lacks common sense. As Shii is the sole daughter in her family, she likes to dote on younger girls acting as an older sister to them, especially Tama.

(Source: Wikipedia)