The writers felt it was important to the character's story. 'Nuff said.
Nuff said? Sorry, not buying it. Why did the writers believe that Raina's physical transformation was important to her story?
You know what? Forget it. I just finished watching the "AoS" Season 2 episodes. And there is nothing anyone has said or what was shown in those episodes which has convinced me on why Raina had to physically transform in that manner, while Skye/Daisy and her mother didn't. I think Mutant Enemy had their own shallow reasons for allowing Raina to transform and are full of it.