Alexia's third form looks very much like the second form, only with the upper body having separated from the giant fallopian tube. The big difference between this and her second form is her incredible durability, which allows her to shrug off attacks from any weapon other than the Linear Launcher.
Category
Enemy
Location
Upper Ant Farm - Antarctic Transport Terminal B4
Appears here once the self-destruct sequence has been activated. She mutates into this form once enough damage has been dealt to her previous form.