Shiro

Shiro (a Japanese name which means "white") is introduced in Episode 10: "Youma weapon! Youth from the past". He is 50 years old, but biologically only 10. He was born in 1980, and put into cryogenic stasis in 1990 to prevent him from dying from a virus which a cure had not been developed for.

He awakens 4 decades later and receives help from Molly when he can't figure out how to use a subway.