Because you like Kyle Broflovski in South Park

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.

Ruling with an iron fist, Pablo owns the drug trade and is bathing in the fame and wealth that the cocaine trade in Columbia offers. See them in Narcos.

Rukia Kuchiki is a cool and collected warrior who has trouble opening up to anyone. See them in Bleach.

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

Basil Hallward is dominated, soul, brain, and power by Dorian. See them in Dorian Gray.

Tina Goldstein is better at getting the job done than following the rules. See them in Fantastic Beasts and Where To Find Them.

Jeff Winger thinks he's too cool for school, which is a problem because he just enrolled in community college. See them in Community.

It turns out Dracula's son Alucard has some pretty severe daddy issues. See them in Castlevania.

Often the one to deliver bad news to the families of victims, Jennifer Jareau isn't sure this is what she signed up for. See them in Criminal Minds.

Empathetic Nausicaa embraces all forms of life, even those that might scare other people. See them in Nausicaa of the Valley of the Wind.

This mathematical genius doesn't have time for small talk; Alan Turing needs to break Enigma, the Nazi's cipher machine. See them in The Imitation Game.