Nobara Sumiyoshi

The tomboy heroine of this manga a first year at Crimson Field. Her favourite thing to do is to play volleyball and even left her familys house because her mother was against her playing. She has had no interest in boys until she starts developing feelings for Yushin. Unexpectedly one night at the training camp she accidentally tells Kanako that she likes Yushin just as he and the other volleyball members come out. When Yushin rejects her she unexpectedly tells Yushin that he is a coward and that she doesnt want him to do anything. She is also aware that Keisuke likes her but does not reciprocate his feelings and tries to maintain her relationship with him as friends. Source: Wikipedia