Sorry that your day sucked so bad. 

And yeah, demons are hotly contested and variable. So I'm just being vague and improvising as I need to. Like I know he'll be affected by religious iconography and true faith (of any religion). Probably pretty tough and invulnerable to fire. Maybe has some ability to cast illusions or a demonic form or something. And I'm also tossing around an idea of growing stronger with each soul that they corrupt. But I'm not sure if I should do that. That's another reason why I am keeping it kind of vague yet: none of these things really have any effect so far.