to be fair she never actually hurt anyone, the village is literally under her protection and everyone lived happy. and with mc and crew she cant really hurt mc (the first fight obv scripted to lose, mc would won that ez) and if she really want to, she could make art suicide when she realize she is losing or just order him to back away so she can kill him herself.
soo yeah, imo she is the best addition to the harem since she can talk to ded and actually able to defend herself (unlike a certain "hero")