Chuck was born Chelsea Checkers. Chelsea grew up to be a very avid athlete and quite competitive. She never felt right among the other girls with her thin, curve-less body, especially once high school started. She couldn't understand why none of her old friends wanted to hang out anymore, they were giving up on sports and turning to pop culture and boys. Chelsea realized she related a lot more to the guys in her school and started to ask her friends to call her Chuck, instead, and that she would prefer masculine titles such as he, him, and his. Chuck is now quite happy being a guy and actually has a secret crush on a certain doe <3

(Chuck is naturally flat-chested, there are no surgical scars. Chuck also still has his vagina.)