Help find manhwas

This two manhwas just keep popping up in my mind but I can't remember their titles
First
Girl gets isekaied into a novel she read as a new character that didn't exist originally, she's the twin of the og protagonist. She loved the villain and hurts for him because she knows he was abused. They ended together he is quite possessive but nothing bad happens she has brown hair I think and I'm sure the ml was blond

Second
Girl also gets isekaied into novel but as the friend who dies to give the protagonist a purpose, she tries to avoid witnessing the duke/marquis killing someone but fails but instead of being offed he wants her to marry him, the queen doesn't like that and tries to off MC but she has healing powers and her head that was cut off heals(quite op healing in my opinion) I think she tries to run away at some point but returns and ends with ml after dealing with the queen

Both are finished I think