Satsuki Kiryuin from Kill la Kill is one of my top favorite female protagonists and my #1 WAIFU UWU
Personal headcanons for Post-Kill la Kill Satsuki:
Satsuki would keep her hair short following the finale, and eventually putting it in a ponytail once long enough again.
Satsuki would leave REVOCS behind to get away from her mother's legacy.
Satsuki would instead work as a philanthropist, using her immense wealth to give to those disadvantaged and helpless a chance of better living.
Satsuki would sell her family mansion and move into more humble and comfortable lifestyle like an apartment in Tokyo.
Satsuki would take as much time off needed to spend quality time with her imouto Ryuko, making up for so much lost time.
Satsuki would take up hobbies such as hiking, cycling, reading, and cooking. Especially tea making with Soroi.
Satsuki would find Chow Chow dogs kawaii!
Satsuki would take time in interacting with her beloved Elite Four friends for simple recreational outings and fun.
Satsuki would see therapy to help cope with her trauma she experienced when raised by Ragyo, but also seek comfort and understanding from Ryuko, Mako, Soroi, and Elite Four.
If Satsuki were opening to DATING, she'd take her time first to find herself and re-orient herself into a sense of normalcy.
I'm open for if she'd be in a romantic relationship with either of the Elite Four, but say if it were a totally new original character, Satsuki would choose a man who's of simple, humble upbringing, is kind, sweet, generous, altruistic, selfless, empathetic, sensitive, and overall loving to her regardless of her own upbringing.
This male OC love interest would always put Satsuki's needs before his own, but Satsuki would always ensure his wellbeing and make sure he isn't overstepping boundaries.
If they were to become more "intimate", Satsuki would be shy and nervous for her "first-time", but her partner would be absolutely patient and gentle on account of her past sexual abuse and torture from Ragyo.
When ready and comfortable, she'd usually have more sensuous and slow sex, with her partner making sure to always praise and adore Satsuki's beautiful, bodacious features and sexy personality.
In time, she'd get married and one day want a baby, a son named Isshin.