One who is a nonconformist or who does not recognize the authority of others.
A member of the organized heretic movement Brethren of the Free Spirit in opposition of the Catholic Church from the 13th to 15th centuries.
Someone who lacks a partner or team.
Something that is different from others in the same category; odd one out.
A temporary crew member who joins a mission with an established crew.
An eccentric; weirdo.