Chatterbox: Blab About Books

List your favorites! They can also be from movies, shows, etc.; I'm not picky. You also might want to mention what fandom they're from, so people can compare notes. You can also talk about what makes them so good, any good backstories or plot twists they have, or tips on writing better villains (I think many of us need those). I'll start. 

My personal favorite villain is Ezra Squall, from the Nevermoor series. He is so perfectly written that he's one of my favorite characters (which is really saying something, considering that both Miss Cheery and Cadence exist in that universe). Half of his writing is him being calm and graceful and a really good teacher to the main character, being revealed as a carefree, charismatic jokester in his youth, and never lying to the protagonist and never breaking a promise, but he's also killed all of his friends and family with no second thoughts and certainly no remorse, unleashes a horrible parasite on an entire city, and sings children's lullabies with lyrics like "little rabbit, little rabbit, stay by mother's side, or the crowling, little crowling, will pluck out your eyes" while stepping out of the darkness surrounded by shadow-wolves. Excuse me, who gave the author permission to write this freaking well. Anyway. What about y'all?