Manhwa Shoujo

Lady Hero’s Soul transferred to a weak body by Demon Lord, new family is Wicked, got engaged to the leader of a Special Squad.

Made sacrifice by shitty family to transfer magical abilities to the elder sister. Survived with the help of past sacrifices’ souls, gained control of her magic, became smart and courageous, and plans to overthrow her family.

Transmigration. Became a noble lady who had a terrible reputation and is now a candidate for queen, her rival is two-faced, she is two-faced, and the crown prince is contradicting. The mc’s wittiness is amusing.