If Kobeni was Doomguy, she would still manage to kill a lot of Demons by accident or sheer luck, the Hell would start to fear and send more demons after her, just for these also getting killed. All of this, without Kobeni noticing the many monsters she has killed, believing that Hell has a special hatred against her or the Demons the fact that her feats are unintentional, thinking of her as a Chosen send to destroy them.