It's funny how since 2011, Aoki Ume already have a slice-of-life KyouSaya, and Mami x Charlotte/ Nagisa... both were only normalised after Rebellion.

Maybe she already got the plot for Rebellion beforehand. Maybe

Well, they're both low-hanging fruit, as far as concepts go; KyouSaya shipping was instantaneous, and Mami/Charlotte shipping started pretty much as soon as the witch life cycle was revealed.