No. 16 is best girl and no one can change my mind!
Edit: Also despite being one of her bullies, 13th's action of patting her head and asking for errands is kind of the closest to the nail of what it's like having an older sister. Both the good and the bad parts.
You don't have to worry about people disagreeing with that. Specially after seeing the only of the usual self-centered girls being spontaneously generous.
I really liked that resolution.
I was only sad that 16th simplistisc view of what a big sis is burned a bridge with 6th.