Okashina Okashi
Keiko Hasegawa - Keiko and Eri-chan are the main characters of the comic. She first met Eri-chan when the Eri-chan came to Japan to study away from home. Keiko is the mature one of the group: she does not often allow herself to see things that aren't there and tends to be very controlled. She is also the one to talk about how hard to believe some events are. Her love with Takeshi ended badly, showing a more unkind side to her. First appearance: OO #1.