Aisaka Sayo

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Born : In the 1920
Death: In the 1940
Height 149cm (4' 11")
Measurements 77cm - 56cm - 79cm (30" - 22" - 31")
Blood type Unknown

The 1st student in Japanese alphabetical order of class 2/3-A, is the helpless and meek ghost of a former student, occasionally accompanied by a pair of hitodama. More often frightened than frightening, she is invisible to virtually everyone, and her presence goes mostly unnoticed though Takahata had her included in Negi's class registry, with a note not to change her seat. Eventually, she does get noticed by her teacher Negi Springfield and most of her classmates and becomes a friend and ally in his quest, particularly with seatmate Kazumi.

Info by Wikipedia