TTT. Memorable (Deadly and Nightmarish) Villains

Top Ten Tuesday is a weekly meme hosted by The Artsy Reader Girl.

Love or hate them, villains are always memorable (unless they are one-dimensional with no reason whatsoever to make the main character's life a living hell). Since I didn't have much to write this post, my list is a bit short (and rushed). But I swear to you that any of these villains will make your crawl your of your skin and give you sleepless nights. *evil laugh*

1. Sloan. First, he's literally a monster - a Malchai. Secondly, he viciously murders innocents, bathing in their blood, and physically and mentally scarred my Kate.

2. The Raven in Red. "All winter, she stole children ... lured them away from warm beds and parents' arms and safe places. Their bodies were found outside her door, frozen on their feet." Enough said, right? This is one deadly villainous ghost.

3. Uriel. SPOILERS! For someone who tried to stage the Apocalypse, destroy humanity, provoked havoc and death with his monstrous creations, Uriel should have suffered a lot more. His dismissal fell short after everything he did and put Raffe through.  
4. Rafette. This beekeeper stalked Angie from the first page. I get: he wanted to break his curse. However, he violated the beekeeper "code" and was ready to sacrifice innocents to fulfil his goal. 

5. Naughty John. Even in his ghost form, he slaughters his victims. But what makes him a memorable villain is his creepy whistling and this nightmarish rhyme he recites as he stalks his victims.

6. The Sea Queen. She's ruthless, heartless and rules the Kingdom of Ketos with an iron fish. Not even her daughter can escape her wrath.

Do you have any villain you love to hate? Or hate to love?

Why is she/he memorable?