The FL we need

FL goes back to when she just married ML. 2nd life FL is more assertive and ML tries to keep her as he thinks she'll want to leave after learning about how poor the East is (she won't, in fact she's trying to help the dying land and its people).

Leads marry because ML needed FL's money and FL wanted a child that inherited the ML's pretty face. They both fall for each other, ML wants to keep FL but FL hesitant in trusting him fully

FL becomes the ML's villainess fiance. FL helps ML w/ his haphephobia. FL also helps ease ML's family relationship. FL tries not to fall too hard for ML as she thinks he will fall out of crush with her once wFL comes into the picture

FL used to be a push-over but now is trying not to be as the villainess she has possessed.

FL wakes up after being betrayed by her master and beheaded. FL decides to change her life by not blindly taking orders and having such a stiff belief to be a knight. She tries to live her life more fully and make amends with her colleagues and make friends with them.

FL neglected and hidden by her family so that she wouldn't outshine her brother who was the heir. She knew she only had 3 months left to live so she goes for the 'monstrous duke' who is cursed with a rotting body; luckily, she can help cure it little by little.

ML misunderstands FL as weak and helpless but she's actually the badass commander of the kingdom and only agreed to be engaged to him for 3 months because her mother persuaded her.

ML scared by FL and faints but falls for her after meeting the 2nd time (still fainted and has developed some sorta PTSD when she unfurls her wings). ML proposes to FL and she agrees but she doesn't trust him 100% because her instincts tell her he has another motive in marrying her.

Has to act like a pet to survive in this world

After being force fed shards to become a literal sword, FL was used by the empire to protect it and if she didn't her family would perish. After being heavily traumatised, she had reincarnated into a human body and taught the heir to the throne to become a tyrant to ruin the country.