Amy

Amy is one of Chang's daughters. She can be found in the VAB Building.

How to Rescue in Fur Fighters
She is out in the open on some metal ramps near the area where you find the Freeze Gun, which is near the wind tunnels.

How to Rescue in all other Versions
Near the entrance to the wind tunnels is an area with a metal ramp. Move up the ramp, and enter the round object from above. At the bottom is Amy.

Trivia

 * Amy is also the name of a scrapped baby originally intended to be rescued in Compound Factions.