In the universe of Mystic Lune, "Extreme Modification" refers to the permanent physiological changes required to channel celestial energy. Unlike traditional magical girls who return to their human forms after a battle, these characters undergo irreversible biological or mechanical shifts.
By the midpoint of the series, Luna realizes that the modifications are additive. She cannot "detransform." In a devastating episode titled "The Ribbon is a Leash," she tries to remove her Mystic Core. Instead, the core activates a failsafe: her own spine elongates into a prehensile tail, a "Familiar Limb" that acts with its own will. Her cute mascot character, a plush rabbit named Poyo, reveals itself as a bio-mechanical parasite controlling the modifications from within her lymph nodes. extreme+modification+magical+girl+mystic+lune