Unknown origins. She looks like a 20-year old college student, but she is much older. Mocha is not even her real name.

None as far as anyone knows.

Exotic. Outgoing. Mysterious. 

She first met them when they were only 7-years old. Mocha is the one who granted them powers they didn't realize they had. 

Mocha is a Kitsune, a magical fox with  multiple tails, who takes a human form to check on Marty and Eli when she thinks they're in danger.

She has no plans other than to help protect Marty and Eli from forces that want to do them harm.