Unfortunately for kura, her current body is considerably weaker then most of the previous ones she has inhabited, leading to her growing fear that she would fail to prevent the shade hour. when she died as tom macguster, she sensed that it would be coming back around in around 40 ish years (she is 20 ish right now)- this would be late in mulligans life so she knew it couldnt be him to help her out when she decided shed need a helper