The artist went with the "teen" Sue theory... while I actually think she is waaaay older than she actually looks... like much much older. Anyway... officially nobody in the Genshiken manga knows her age... so who knows?.
Madarame is too short.What is it? It's my fault?!Eh?!It's awkward to hold hands.Sue x Mada 5 years later (?)5 years later Sue will become tall as a super model... Maybe.