Because you like Ricky Ricardo in I Love Lucy
Bodhi Rook is a defected pilot for the Galactic Empire dead set on destroying the Death Star. See them in Rogue One.
Helena is a mentally unstable, childish, and completely merciless. And most of all, she's an unstoppable killer. See them in Orphan Black.
Toby Cavanaugh has trouble avoiding being manipulated. See them in Pretty Little Liars.
Cyclops shoots lasers out of his eyes, destroying anything in his line of sight. See them in X-Men Series.
Tina Cohen-Chang is a shy loner who becomes a fierce performer on stage. See them in Glee.
April Kepner is an excellent surgeon, but outside of the operating room, she's more anxious than most. See them in Grey's Anatomy.
Point the fun-loving Pippin Took towards second breakfast, and he's one happy hobbit. See them in The Lord of the Rings.
Baloo is a fun-lovin' bear who just needs the bare necessities of life See them in The Jungle Book.
A devoted butler, Alfred Pennyworth is both a fiercely protective guardian and a lethal gunman. See them in Gotham.
A determined and cold-hearted spy, Cassian Andor will do what it takes to stand up to the evil Galatic Empire. See them in Rogue One.
Spyro the Dragon loves getting into trouble around the Dragon Realms. See them in Spyro the Dragon.
For the sake of science, Kurisu Makise will persevere no matter how deep into the dark secrets of the world she finds herself. See them in Steins;Gate.