Arigase, Ryouko

蟻賀瀬涼子

Ryoko, one of Koizumi's friends, has long purple hair. She tends to stay calm regardless of what is happening around her, usually putting on a face that matches the situation and saying something to match it. In the manga, she is considered a Venus with purple hair because of her well-endowed figure and sexiness. In the manga, she also has a boyfriend named Konoe, who is a friend of one of Saji's friend's older brothers. His shyness leads her to usually take the initiative in the relationship, which seems to suit her just fine.
She has a habit of somewhat discreetly supporting Saji and Koizumi's relationship by putting them in compromising situations and making various short comments about her interpretation of what Koizumi really means when the girl expresses frustration or hatred for Saji. At one point in the manga, she counseled Saji (who was trying to learn from Konoe how to control himself better) to be himself, as that is what Koizumi likes, even if she won't admit it.