LUNA LOVES GINNY RIGHT BACK!!!!! Ginny will still be part of her bedroom mural, no matter how differently Luna will make it now.
If Luna ever knew, she'd be very (pleasantly) surprised. She's comfortable with herself, but she doesn't imagine anyone envying her since she doesn't envy anyone.
And, of course, she'll be kind and polite to everyone of your girls because that's how she rolls.