Even though I don't personally care about having the Snow/Lightning hair unlocked on all my characters (since I hate the bandana on Snow's hair and Light's hair is overused), I still don't see why we can't have them already unlocked at the Aesthetician if we've done the quest on a different character. I'm an altaholic, so I have 7 characters on my account at the moment, and it'd be nice if more stuff could be shared between them, such as cosmetic items (even if the only real cosmetic we've had added to Jandelaine is the Lightning/Snow hair).