You're back in the normal dimension after he dies.

You're his personal assistant.

SO BASICALLY. You are you in this story but the timeline is all the same up until Cardan becomes king and you his seneschal. (I put  the whole Wiki in here) 

You're his seneschal - (Taryn's twin sister) 

Kaz Brekker, the 17-year-old leader of the Dregs, is the cold, calculating mastermind of the heist who skillfully manipulates dire circumstances to his advantage while privately struggling with the emotional scars of his traumatic origin story, thief with a gift for unlikely escapes, Kaz Brekker is a criminal prodigy who made his name on Ketterdam's streets by turning the Dregs into a gang to be reckoned with. Cunning, quickwitted, and a born leader, he's a planner who leaves nothing to chance. 

You're one of the Dregs.

Confident and proud. He's energetic and always looking for something to do. 

Nox Laedric from Princess Of Souls. 

Name: cardan Greenbriar
Height: 6'0
Age: 17 years old
Personality: persuasive, jealous, selfish, cruel, confident, humorous, powerful, witty, sarcastic, rude  
Status: prince of elfhame, youngest child
Friends: Valerian, Loke and Nicasia

He shows everyone that he really really hates you when actually he loves you either way you are enemies and he annoys you often getting on your nerves. 

Prince of Elfhame 

He is a tall calm person who only lashes out when you provoke him. He works against the king and is determined to win.

Trystan Mavernie from assistant to the villain

You stumble upon him

Charismatic, flirty, funny, smart, dangerous