I'm redoing some of the NG characters and these are:
Noxis - the change is going to be her sex
Luff Puff- I will add a twin brother
Vortex- its true shape
Thunder Mistical- your sexual orientation
Cake Cheese Pie - her dead brother
Rose- the name and cutie mark
Mellody- She's going to have a little brother.
Twilight Misty and the Sun Sentry - are going to have a stepfather and a little brother
Pacifist- I'm going to change her sex too
And that is all.