Mikoto

A girl Yuuichi met one day in a back alley. She's a fantasy princess, who is trying to fight against the Dream Corridor.

A very cheerful and high-spirited kind of girl.

She fights using an umbrella. She can open it up to fly in the air, and when she spins it, magical energy comes off of it that she can attack with. When closed, her umbrella has a fluffy, puffy shape.