Because you like Will Herondale in Clockwork Angel

Whether it's a companion he’s failed or lingering guilt from the war, the Doctor can never truly let go of his past lives. See them in Doctor Who.

Hanna Marin is a determined girl defined by her ability to transform herself. See them in Pretty Little Liars.

In constant agony, Ava Starr will do anything to give up the superpowers that are slowly killing her. See them in Marvel Cinematic Universe.

Anya Jenkins has a real harsh bark to go with her demonic bite. See them in Buffy the Vampire Slayer.

Once described as a "beautiful, tropical fish," Ann Perkins exudes warmth, and unlike most of her friends she also has common sense. See them in Parks and Recreation.

Jenny Flint is a devoted wife and daring crime fighter, which is pretty unconventional for a Victorian maid. See them in Doctor Who.

Relentlessly cheerful and optimistic, Erin Hannon is an office receptionist. See them in The Office.

A singing nanny, Mary Poppins is practically perfect in every way. See them in Mary Poppins.

Experiment 626 was designed for one thing: to destroy everything he touches. See them in Lilo & Stich.

Sabrina Spellman is half-witch-half-human, a headstrong and loyal cheerleader with an affinity for spell-making. See them in Chilling Adventures of Sabrina.

Mavis Dracula's interests are anything black, scream cheese, and flying around. See them in Hotel Transylvania.

Arizona Robbins loves being a pediatric surgeon, and the cute orthopedic surgeon downstairs makes coming into work worth her while. See them in Grey's Anatomy.