As the changes continue up her limbs, it's undeniable that Fluttershy is turning into a changeling. The skin of her flank dries and falls away, revealing her cutie mark has migrated to its more chitinous counterpart. Understandably, she's started to panic a little bit. Her fidgeting seems to pull her already loose epidermis apart further, and her mane and tail hair fall away rapidly. The feathers on her right wing follow suit, revealing a transparent luminous appendage underneath. FA source