Because you like Sarah Manning in Orphan Black
Tidus is upbeat, carefree, and desperate not to become his father. See them in Final Fantasy Series.
In constant agony, Ava Starr will do anything to give up the superpowers that are slowly killing her. See them in Marvel Cinematic Universe.
As a monster-hunter cursed with supernatural abilities, Geralt of Rivia is a cynic burdened by scruples in an unscrupulous world. See them in The Witcher.
Some say to survive in Underland you need to be as mad as a hatter–which, luckily, he is. See them in Alice in Wonderland.
Thor is Asgardian nobility who is tickled by how us earthlings live. See them in Marvel Cinematic Universe.
Burton Guster is a level-headed investigator with a "Super Sniffer" nose. See them in Psych.
Vincent Vega likes a good steak, a cheap milkshake, and killing a target without anything going wrong. See them in Pulp Fiction.
Ratchet is a shoot-first, ask-questions-later, and then-shoot-again kind of lombax. See them in Ratchet & Clank.
Steve Rogers is a good soldier. But above all, he's a good man. See them in Marvel Cinematic Universe.
A dreamy space cadet, Luna Lovegood has never met a conspiracy theory she didn't believe in. See them in Harry Potter Series.
Jacob Black is the boy next door who's also the wolf next door. See them in Twilight.