Rigald had plenty of time to attach it back. While I do not deny the possibility of them regrowing their limbs it shouldn't be growing back unless they're a monster like priscilla or Isley I'd think. If you were hinting at the possibility of Ilena surviving by Awakenining hence regrowing her arms, save it. If that was the case the organization would have known and sent Alicia for a test run should Raphaela unable to stop her.
Pray tell what is your insightful mind telling you about the 80% of Raphaela's well beings and how she is alive or why. It wasn't a bear hug, she completely broke her sister's back probably damaging the spinal cords. Revenge? You really think she'd be thinking about revenge? How will revenge solve anything and would it be worth losing ones life? Also if you were Raphaela bent on destruction of the organization and ultimately revenge would you wait? No, if I was her I'd find the most opportune moment when I've gotten all the intel I can about Luciela I would slaughter the black robes to the brink of their extinction and foil their Alicia plan since without the robes the dolls practically useless. Raphaela isn't dumb.Do you think Rafaela is still alive after her meeting with weaken luciela?
Rafaela gave a bear hug to kill her sister? XD
I think the chance for rafaela was death is 20%.. Reason : Her purpose to kill luciela that made her still strong has been completed.. I think she comitted harakiri / sepuku (suicide) after that scene XD
Only farfetched idea I could come up with to make Ilena alive and Raphaela plan out the revenge is the blank gap we never see of Ilena actually dying. Raphaela and Ilena could have had some agreement that when its her turn to die which would be after she settled the old score with Luciela she'd come to Ilena to give her a pair of arms before dying peacefully so she leaves Ilena alone. As much as I'm a fan of Ilena and I don't wish her demise either, I think thats a pretty farfetched ideas considering how Raphaela attacks without question.