Darksides

Darksides are evil version of humans. Mostly humans are born with a Darkside in them. They're composed of every negative emotion and feeling that the person has felt throughout their life molded into a human looking form. Most people keep their inner evil at bay with strong wills, but if they give in then the darkness inside of them will overpower them and the human will take the shape of a darkened version of themselves. Mainly the normal appearance of a Darkside is dark blue skin, pointy ears like an elf or something, and red eyes. There are two kinds of Darksides, the first kind are those who're good but are corrupted by Darkness and their split evil persona possesses them and locks the original good one away from the subconscious prison that the bad one's been. The second kind are actually those who do bad stuff like bullies or villains, but if they accept Darkness instead of fighting it then they will become a Darkside but keep their memories and emotions only they'll be a it more feral and violent.