As much I find the whole "Iemitsu messes with Nana's head with Mist Flames for her own good" theory valid and in character for both of them.
I have been seeing a trope I really liked in both Sage (The Boys) and Alison (Umbrella Academy) and Wanda (Marvel)
That a character with mind related powers brainwashes themselves for the sake of their peace or delusions or just to deal with their psyche powers in general.

















