Doctor Zuko Funaba studied the human body for 10 years and graduated from Caleb City Collage.

He eventually got into the Caleb City Hospital and served for 6 years.

However he got a contract from Lady Nuff, which means his life was hers to control and she decides who he heals and who he doesn't.

Funaba gained the Soul Power "Bonebreaker"

A power he uses to mend and create new bones from just a touch, however he can also break bones if the person has ever visited Funaba, Nuff doesn't know about this power.