First Sin is Sloth. Sloth-based demons usually take their time to hunt their prey and don’t rush things. They make sure they know almost every aspect of their victim before acting, or just wait for the right chance and take it. They’re not as many as other sin-based demons, but when they show up, they never fail.

One of those demons is Frost. While in this image we’re seeing Aion, a mortal, he has this demon inside of him, and thus his lizard, frozen tail covering his own. Frost has the ability of materializing ice from the humidity of his surroundings, but since he’s living inside Aion’s body, he has to use some of the water on his body. This is a limitation, since his host could die if he uses too much power, and the fact that Frost normally can’t control Aion’s body doesn’t make it easier for him to fight with him, since they have to synchronize together. For this, he considers himself lower than a normal Sloth demon, and only helps Aion when he really needs it. Of course, if he really has to because his host is in severe danger, he’ll just take over his body. The only problem is that he can hurt it severely if he does that for too long.