The Originals - Rosemarie Mikaelson

If you have seen The Vampire Diaries or The Originals or Supernatural, this is a story that may not be completely original, given the fact that uses some of the characters from the shows, creating a story of a new character.
This is the story of Rosemarie Mikaelson, a tribrid, Klaus Mikaelson's twin sister who discovers humanity and love, saying goodbye to her heartless past self. She has been called many names in the past, but one stuck to her, The Executioner. She has always been a warrior, a leader, someone who is good at their job and does not have any distractions. Everyone fears her. Until something unusual happens.
Waking up from a deep sleep that she had been in for a very long time, she finds out that everything in her life is about to change. She is losing her powers and that is one of the rare things she feared in her very long life.
She has to choose her allies carefully, otherwise she might be hunted by her many enemies.
During her chase for her powers, she meets Dean Winchester, a hunter, people with whom she does not usually get along with. They become close and with time, perhaps even more.
But things get complicated and the question remains, what will happen to Rosemarie and what will she do in life once she finds out that humanity is more than she thought it would be?