Hmmm let me see if I can get it right

Our Villainess MC Did bad in her previous life then gets Isekai to Korea where she is alone and considered an orphan. As she grows up she feels odd in the world and so as she goes on with life she gains sudden thoughts of the past and starts making a story about it via manga/manwah. Ahem as she works hard on, one day she just dies right there and then. Then she goes back to her og world with bits of her memories gone from when she was a villainess and is now just a simple little girl with memories of Korea while her Villain persona becomes a sorta guide? As she regains stuff in the world the enemies of the country she lives in try to influence her feeling her negative energy and power seeing her a way to destroy the kingdom. Her brother and others around her are protective of her and ummmmmm.... So as the story is going we gathered the heros around and have a altercations with the enemy faction which I'll say the enemy lady goddess has a nice design. So the enemy manages to curropt Emi for the time being but is saved by her brother and the og FL. But it's only for the enemy faction to get an idea what the siblings can do and what their worth is as tools. The brother shows his light magic and see Emi as a catalyst for dark magic. Umm and the heros help out our Emi and restore her body of darkness. Then we get a flashback and show how the kingdom fought off the evil kingdom and in order for the kingdom to win was the sacrifice of Emi's mom to power up the duke (her dad) to stop the evil goddess. Somehow the enemy faction got the mom's eye and offer it to the Duke as a peace offering but the duke and the son know this is a sort of trap. Meanwhile Emi's mom is in Korea looking over Emi's Korean body. Also Emi has a personality of feeling weak and unwanted I think?