Because you like Miles "Tails" Prower in Sonic the Hedgehog
Hanna Marin is a determined girl defined by her ability to transform herself. See them in Pretty Little Liars.
Django was once a slave. Now that he has a taste of freedom, he understandably wants a full meal. See them in Django Unchained.
Jane Foster is an astrophysicist who suspects the colors in the sky may be a portal to another world. See them in Marvel Cinematic Universe.
Make sure not to anger the Hulk or else he will transform into a giant green monstrosity and smash anything in his way. See them in Marvel Cinematic Universe.
Nemo is a small fish in a vast ocean, but he dreams of seeing it all. See them in Finding Nemo.
Artemis Fowl understands the way of the world. If he wins, he's a prodigy. If he loses, then he's crazy. That is how history is written. See them in Artemis Fowl.
Charlotte is ready to embrace connection in a strange place. See them in Lost in Translation.
A sadistic sociopath, Lil Z is helping make the City of God slum a Hell on Earth. See them in City of God.
Elio Perlman likes the piano, peaches, and his father's new research assistant a little too much. See them in Call Me by Your Name.
A beacon of positivity with a brilliant legal mind to boot, Elle Woods breaks down stereotypes about what girls can and can't do. See them in Legally Blonde.
Emma Woodhouse knows what's best for everyone else. Just don't try to tell her what to do. See them in Emma.