There's more to Final Fantasy XIII character Serah Farron than simply looking reminiscent of an erotic game character. Much more.
Serah is the headstrong, independent younger sister of heroine Lightning and lady friend of bandanna-wearing hero Snow. Lightning does not approve of her sister's engagement to Snow.
Like Lightning, Serah is a L'Cie and has a tattoo of red spheres on her left arm. She also has a frilly skirt.