Because you like Leonard Shelby in Memento

Kara "Starbuck" Thrace will beat you in cards, drink you under the table, then fly circles around you in her fighter plane. See them in Battlestar Galactica.

A jealous woman is dangerous. A jealous assassin woman like Elle Driver is even more so. See them in Kill Bill vol. 1.

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

Beneath Lena Duchannes' prickly exterior lurks a sensitive, compassionate soul. See them in Beautiful Creatures.

A brave "Young Wolf," Robb Stark has never lost a battle. See them in Game of Thrones.

Big Boss is a disillusioned mercenary commander who wants to create a world for soldiers (and soldiers alone). See them in Metal Gear Series.

Knuckles the Echidna is a 16-year-old red echidna (aka a spiny anteater) and guardian of the ancient Master Emerald. See them in Sonic the Hedgehog.

Leatherface's moods change with his masks. See them in The Texas Chainsaw Massacre.

After years of living vicariously through other people's heroic stories, Wade Watts is about to become a hero himself. See them in Ready Player One.

A hurricane of a human being, Marla Singer is destructive and unforgettable. See them in Fight Club.

Barry Egan has too many anger issues to list here. See them in Punch Drunk Love.

Ultron is security software turned evil mastermind. See them in Marvel Cinematic Universe.