[irvinethearcher]

I don't judge raffaella on killing irene, she had in a way no choice because she wanted the information from the org about her sister, so she was the "cleaner" for the org. She's not bad imo. She's another victim of the org, like all the others. She felt guilty about her sister and was ready to do everything to erase her debts to her sister, she believed she had. At irenes "death" clare's arm reacted. IMO there are simply to possibilys for such a thing:
1. most probably irene is now in claymore heaven
2. irene awakened but this seems to be impossible because rafaella killed luciella and theres no way for rafaella to survive an #2 awakening.

It is even possible that raffaella comited suicide but i don't hope so. I hope something let her keep going on.
It is indeed interesting what raffaella knows, because she is probably the claymore with the most knowledge of the org's structure.