Akako Koizumi

A girl that goes to Kaito's school. She is actually a witch with real magic, which causes her to be very critical of Kaito's "sleight-of-hand" magic. She knows that he is Kid, but has not told anyone. Akako is very much a seductress, and is "trying to make every man her slave." She is at first angry at Kaito because she cannot "control" him, but then she grows to like him. She seems to be able to summon Lucifer at will.

(Source: Wikipedia)