Vassal

I grunted. Then I eyed Hook, who had continued to sit in the same spot during the entire conversation. “So I’ve gone and made him my guest, eh?”
“Well. More like your vassal.”
I frowned. “Uh? What?”
“That’s what surrender is, duh,” Toot said. “His life is yours to do with as you please. And as long as you don’t starve him or make him an oathbreaker, you can tell him to do whatever you want. And if his liege wants him back, he has to pay you for him.”
“Ah. Medieval-style ransom.”


Cold Days Chapter 29, Page 290