Mobile Suit Gundam Seed: White Dragon

Dr. Yura Hibiki conducted a forbidden gene experiment on Mendel's colonial satellite and successfully fused the genes of the extraterrestrial creature "Dragon Skeleton" with human embryos to create the only surviving individual codenamed "Elphy". The extraterrestrial genes lurking in the body of the protagonist Alfie allow her to partially cover hexagonal white scales when needed. These scales have energy damping properties and can deflect live ammunition attacks. Briefly tell the story of Alfie Klein