Kana Mizuhara

The second main character of the series Kana is a spirited tomboyish girl who excels in virtually every sport she attempts. Brave athletic and rather pretty she has also been described as having a heart big enough to float a planet. It is her willingness to help others than draws Sou into cases. She first encounters Sou when she rescues him from being attacked by a bully at a video arcade. She is warned by her close friend that Sou is mysterious having apparently come to their high school after leaving MIT and she should probably leave him be. Shortly thereafter her friend learns her father was murdered leading Kana to drag Sou along to support her. Her father Detective Mizuhara is the man in charge of the case and with Sous help arrests the murderer. Since then the two have been nearly inseparable in that Kana drags Sou almost wherever she goes. She categorically denies that the two are dating but there have been many hints in the manga that she is slowly developing feelings for him on one occasion when she learns both of them have no plans for Christmas she attempts to ask him if hed like to spend it with her but is interrupted. She later admits to a female senpai upperclassman who was interested in Sou that she is confused about the relationship between herself and Sou because she think they are more than friends yet she still cant give a name the feeling she felt nor can she describe their relation. The fact that she knows so little about his past bothers her greatly and she often tries to find out more about him going so far as to secretly follow him after school. What little she learns often either impresses her or makes her unhappy at how much Sous been through. Kana is a popular student and she is often seen in a leadership role. She practices judo and kendo the former skill often coming in handy when attempting to defend herself or Sou and apprehending suspects. She is also apparently infamous for her violent tendencies showing no mercy to anyone who dares suggest there is something more to her and Sou than friendship. Source: Wikipedia