Because you like Leslie Burke in Bridge to Terabithia

Motivated by a strong sense of curiosity, fleet-footed Lina Mayfleet is happiest when she's on the move. See them in The City of Ember.

After figuring out how both the light and dark halves of his soul could co-exist, Jak is maturing into a real hero. See them in Jak and Daxter.

They say they saved Adam Jensen by turning him into a cyborg, but he's not sure saved is the right word. See them in Deus Ex Series.

Wanderer is a Soul, a parasite sent into a host to take over their body, extracting information from them and colonizing their species. See them in The Host.

Curiosity and compassion aren't always to Jonas' advantage. See them in The Giver.

Everyone is just a chess piece, and Izaya Orihara is a master player. See them in Durarara!!.

Jax Teller can be cool or vengeful, calm or wrathful, depending on the situation. See them in Sons of Anarchy.

If Anna Liebert could remember her past, maybe she would know who she is. See them in Monster (TV Show).

Yes, she's an "older" woman, but that just makes Mrs. Robinson sexier and more seductive. See them in The Graduate.

The Kid doesn't talk. He just acts with determination. See them in Bastion.

Firo Prochainezo is swept up in a world of mysterious women, alchemists, and rumors of a wine that makes it drinkers immortal. See them in Baccano!.

The brilliant and well-adjusted Ender Wiggin is being groomed for the next generation of military leaders to fight alien invaders. See them in Ender's Game.