キューピィ

An entity that embodies the will of the Earth. It was born to stop the invasion of Barbaroi. It receives the energy of the Earth and focuses that energy to transform Koujina into a magical girl. Despite its cute appearance and voice, Kyuupi has lived for 4.6 billion years. Kyuupi naturally looks down on humans. It believes that since they are the planet, it should do whatever it takes to protect itself. [From official site]