Mai

マイ

A student at the Santa Claus Academy who struggles with her magic. She can only conjure items that begin with "san" (サン) in Japanese. Her mission is to cheer up Santa, so she was sent to him. Mai initially appears to Santa as a junior high school student. Later, when Santa begins to believe in Santa Claus, Mai acquires sufficient Christmas powers to transform into her adult form. In this mature state, Mai oddly uses the hyper-masculine pronoun "ore" (rather than the traditionally feminine "atashi") to refer to herself, despite the feminine appeal she gains from the transformation.
[wikipedia]