Because you like Montgomery Scott in Star Trek
Billy Batson is a troublemaking teen grappling with a pretty weird superhero identity crisis See them in DC Extended Universe.
Leone Montana is a fearless hitman with a surprisingly sensitive side. See them in Leon: The Professional.
A brave but pessimistic nobleman, Boromir knows one does not simply walk into Mordor. See them in The Lord of the Rings.
Claire Temple is a dedicated nurse providing secret care to New York's vigilantes. See them in Marvel Cinematic Universe.
There's nothing like discovering dear old dad is a serial killer to send you into an (understandable) funk. See them in Hannibal.
White Witch's heart is as frozen as the land she rules. See them in The Chronicles of Narnia.
A stylish agent, Agent J would rather improvise than play by the rules. See them in Men in Black.
Born and raised in the darkness, Bane is determined to have the city totally under his control so that he can demolish it. See them in DC Extended Universe.
Ultron is security software turned evil mastermind. See them in Marvel Cinematic Universe.