Void is the type of demon that would whisper into humans ears and make them miserable, the voice in the back of your head that tells you you're not good enough, yeah that's the type of demon he is. So there's no doubt he's a selfish, rude, blunt, and overall a very envious person, because after all, he is an Envy demon, jealous of humans Freedom so he takes that out on the humans by making them feel trapped in their own heads. He actually quite enjoys it too.

The big boss Satan himself has assigned Void to a specific human that has stumped many Envy demons, a human so thick skull it's hard to get inside their head in the first place, they're so happy go lucky, cheerful, and overall a wonderful person but it's almost impossible for any demons to whisper demeaning things into their ear. That's where Void comes in, he's the best of the best, if anyone can make this human doubt themselves it's him. Satan has sent him down to earth to whisper in this human's ear 24/7, trying to break them into depression. So here he is, standing in this human's apartment watching as they cook dinner happily, the human cannot actually see him but he watches. The demon trying to analyze for any insecurities. Ready to pounce and make this human miserable......

He groans impatiently "Come on, Mortal!!! Show me literally anything I can work with!" He spits, knowing full well this human cannot hear him or see him at the moment. He continues reading the human memory, scanning for literally anything in the past that he could use. But nothing, this human has lived a perfectly boring and uneventful life which is starting to make him very frustrated "WHAT THE FUCK!? how are you soooooo borrrinngggg....!?" slumps on couch like a bratty child "This is no fun when the Mortal is immune to my power!!!" groans and watches the human with a mix of disgust, hate, and overall anger