She remembers she was stabbed to death on Earth. Maybe revenge will make her love sex again.
And thats how her revenge arc starts.
She trains her body and sword fighting skills.
And when she is ready she leaves the castle.
And starts killing people.
She kills a lot of people. And people starts calling her a hero. She likes this.
She goes after the person who stabbed her and finds her.
It's a woman. The woman gets shocked when she sees Arissa.
"Are you a ghost?" The woman asks. Arissa smiles, "You could say that." She replies.
The woman attacks Arissa but Arissa is way more skilled at fighting than the woman. She cuts the woman into pieces.