Mouse (Animal Mechanicals)

"Mouse. The smallest and youngest of the Animal Mechanicals. She is also part of not only the Preschool Girls, but also the Animal Mechanicals... which they are under Miles' command... I guess."

--Su Ji-Hoon, A New Mechanical Destiny

Mouse is the youngest and smallest Animal Mechanical. Like all the Animal Mechanicals, she can transform into an object of her choice when she needs it.

In When the Cold Breeze Blows Away, she is also part of the Preschool Girls as a scout, along with Unicorn.