I like the one with the blood dripping from his mouth. It is cute and creepy. I feel like it has a backstory built into the character design that really makes me curious about what is going on at first glance.
Great designs! Personally I'd go with the pumpkin one, but they're all awesome.
Nice work with the characters. Well done.
A bit Man in the Iron Mask, a bit Ned Kelly. Nice!
I like third, in his absolute simplicity.