Юкіхіро Аяка

She is currently the 3-A class president and is among the highest scorers on school exams, where she was last seen as ranked 4th in her whole grade. She and Asuna seem to hate each other, with the two often getting into fights, but it eventually becomes clear that they merely have an odd, but surprisingly close friendship that neither is willing to admit to. She is the girl most overtly fond of Negi, though she stands by the position that she is only interested in Negi because he "needs a mother figure". Though she is highly intelligent, she can often be clueless in relation to the events surrounding her. Thus, many of her classmates incorrectly think of her as a fool (even if they won't say so out loud).

(Source: Wikipedia)