Karharot said:
During her first encounter with Riful Clare mentioned that "I witnessed it once already in the past... An immense and utterly sinister yoma energy like this..." IMHO the only thing that she can be reffering to is the moment when she saw Priscilla awakening. The fact that she sensed it so clearly as a human might be a result of facing Proscilla right after her awakening when she was not concealing her true aura, and if that is true and Priscilla youki is as overwhelming for a human senses as is Riful aura is for trained senses of a Claymore...
Yeah, that's kinda what I meant. So she still remembers that sensation she felt as a human. She may not know Priscilla's exact yoki, cause she could not sense yoki at that time, but at least the sensation is still there. (Hopefully that makes more sense.)