So I am a bit disappointed for having waited for so long for what was given. The initial transformation of Alex into her first form is never shown on screen.
When you do finally get to see her second TF into her final form and the modefication of it, they mostly happen with a shadow effect or the camera moves so much that you dont even get to see much of what is happening.
The first TF happens at 1:19:45
The second at 1:34:30
https://www.youtube.com/watch?v=6R2_OcdLCUU
I am sure this should go without saying, but there are major spoilers within that video, so for those of you who dont want them, you were warned.