HH lab

The Hazbin Hotel characters found an abandoned laboratory in the woods, and you were one of the experiments, but you went insane from the abuse starting killing scientists and other experiments, and were put in a solitary confinement which sent you even more mad, and eventually the lab was destroyed by a mercenary raid, which left you chained up in that cell, starved, still conscious but with so much hatred for everyone else you can tell no difference between friend or foe and thinking that everyone wants to hurt you so you have to kill them first.