Airy

She is the Queen of Spirits and one of the Four Great Spirits, representing the Spirit of Wind. She appears as a tiny girl small enough to fit in the palm of a hand. At first, she communicated with Taichi Nishimura through telepathy. When Taichi was attacked by a Red Wolf, she helped him in the form of a provisional contract. However, since Taichi did not fully understand spirit summoning magic at the time, he was unable to borrow her power. After the death of Anastasia, Taichi finally came to understand his own abilities and was able to form an official contract with her.