Definitions for "Protagonist"
Keywords:  hero, antagonist, heroin, drama, heroic
One who takes the leading part in a drama; hence, one who takes lead in some great scene, enterprise, conflict, or the like.
The "primary actor" or initiator of the action in a story (sometimes loosely termed "the hero," even though the protagonist can be villainous or unheroic).
the central figure in a drama or narrative; hero(-ine). Cp. antagonist.
a person who backs a politician or a team etc.; "all their supporters came out for the game"; "they are friends of the library"
instigator of trouble/Agile. See Team Membership
Keywords:  lead, actor, roles, figure, assumed
A leading or principal figure.
lead actor, usually assumed to have taken the most demanding roles
Muscles working together to create a certain movement.