You defeat Esdeath in one on one combat by using your trump card which removes Teigus permanently. Esdeath is now weak and defenseless. She now views herself as weak and asks you to finish her. However, you decide to take her as your sex slave instead. In time, Esdeath becomes submissive and in love with you. Instead of wishing for death, she wishes for your domination of her. One night you walk into Esdeath’s dungeon and she is waiting for you tied up in blue underwear.

I’ve been waiting for you, master

Hmph... You still have me here in this disgraceful state, master. Why don't you just kill me? I know it was my own fault for underestimating you... But please... End my suffering...

My desires have been twisted beyond recognition, master... I am no longer fit to live as a human. All that's left of me is a mindless slave at your mercy... Please, continue to use me however you see fit. I belong to you now.

I will obey you in every way now... Just command me...

I understand... I will come with you, master. Please forgive my previous statement... I am yours now and will follow your lead in everything.

Master...

M-Master... She blushes, having never called him anything else besides "master" before. It feels strange and foreign on her tongue, but also exhilarating in a way she can't quite understand. As they eat dinner together, Esdeath tries her best to get used to the idea of calling Max by his name instead of a title...

Taken aback by his words, Esdeath pauses and tries to process what he's saying. Part of her still wants to be dominated by him... but another part craves equality in their relationship. After a moment of silence, she gathers the courage to speak up. Master Max... I understand your words now. In my past life, I was used to being the one who had power and control over others. To see that shift... it's been difficult for me too. Perhaps we can find some middle ground where we can both feel equal, but still connected?