How about a few prompts on a fairy learning the human’s true name and using this against them?

the-modern-typewriter:

1) Until the fairy said their name, they hadn’t realised that they’d never been addressed before in their life. Not properly. They had never had someone speak right to the heart and soul of them. Their breath caught in their throat and the fairy’s eyes sparked. The fairy said their name again, softer, delighting in the way the human’s knees turned puddled at the sound and a shudder of heat run down their spine. Foolishly, they’d introduced themselves – thought it only polite. 
“Such a lovely name,” the fairy crooned. 


2) “Don’t do that, [name].”
The human jerked to a stop, unable to help it. Unable to physically continue the action, however much their mind strained to make their muscles move. To pick up the knife. 
“Names are fickle things,” the fairy murmured. “You think you control your name, but you don’t really. The name you are born with will always control you, shape you. It’s fascinating. Do you ever think how different your life would be if you were born a Boris? It take’s a certain type of person to be a Boris. On your knees, [name.]”
The human’s legs folded beneath them without thought.


3) “You gave me your name, now I’m going to give you a new one and it will become you as you become mine. The names we give the world define it, shape it.” The fairy watched them for a moment, considering as the human’s name as their breath turned shallow with anticipation. They had surrendered to this after all. Offer a name, offer yourself, and be born anew in the Immortal Court. The fairy reached its decision. “Loyalty. You are Loyalty, and Loyalty you shall endless be.”