She was hit in the face by a big BIG explosion, I was sure she was dead, a plot twist for make Ren grow up and be more careful in future missions.
But in the last frame in the prewiev we can clearly see Ally.
I doubt a explosion like that leave a body to mourn then I think she is still alive and probably in a coma.
And I hope that, killing Ally is a bastard move.
The flower absorb the prey and after that explode, I don't think is possible a body can survive that.
***SPOILER***
I've said you,she is alive, a short coma and all healed.
It was the reverse, the flower burn the prey and absorb the remains, what a fucked up system.
And now she must escape.