After this I can imagine everyone potentially questioning Kagura on whether or not she hesitated on killing Mimi and then they would potentially call into question her resolve to one day put down Raito if he ever turned like she promised.
Man, I must have read way too much weird zombie shit for me to consider that maybe they could cut off her limbs to make her harmless until they find out if there really is an ancient civilization cure.
I swear to god if they do some bad to good type shit with the people they are fighting now I'm gonna lose it, they don't deserve forgiveness for turning mimi into that