I'm looking for a list of famous or well-known trios from fantasy, fiction and folklore.?

Question

They must be 2 guys and 1 girl

Answer 1

Captain Jack Sparrow, Will Turner, and Elizabeth Swann: Pirates of the Caribbean

Batman, Robin, and Batgirl: Batman Returns

Buster, Plucky and Babs: Tiny Toons

Answer 2

Harry Potter, Ron Weasley, Hermione Granger

Luke Skywalker, Han Solo, Leia Organa

hope this helps, why do you need these?

Answer 3

Goldilocks and the three bears..?  Papa bear, momma bear, and baby bear - who is typically portrayed as being a boy.

Batman, Robin and Batgirl?

Robin Hood, Little John, and Maid Marian?

Winnie the Pooh, Kanga, and Roo?

Hope that helps. Perhaps narrowing down or expanding on what you're looking for could trigger better responses if these aren't suitable.  :-)