one who rejects lawful or conventional behaviour
renegade - rebel
The word ‘renegade’ can be used in both a positive and negative context. When used to express somebody who abandons a cause or set of principles in order to join an opposing side, it is used with disapproval. However, when used to describe a person who is a free-thinker, it is used positively.
I know Tom is a difficult to control renegade, but that’s what makes his work so creative and innovative.
The renegade soldiers deserted their posts and joined the rebel forces operating in the area.
The scientist has a reputation as a renegade because she uses methods that are considered highly unconventional.