Shishio:

Widely believed to be the Devil, Shishio is a superlative asshole. He could also be described as "hatred and rage incarnate". He frequents the comic book shop Through the Looking Glass on a basis of varying regularity.

Shannon:

A lethargic woman who used to work at Through the Looking Glass, where she and Shishio became friends.

Red:

Owner of Through the Looking Glass, where he loves to make his customers cringe with cheesy puns. Has known and put up with Shishio longer than anyone else, maybe because Shishio occassionally buys something.

Ashton:

Met Shishio through work. Ashton and Shishio absolutely despised each other for about the first six months they worked together, then they learned to get along.

Ashton:

A friend of Shishio's and the other Ashton. They met through work as well. Ashton is quite possibly one of the biggest dope fiends on the planet.