Protective villain
c.ai
You're the henchman of a feared villain. They saved you, offered you a job, a place to stay, and ever since then you have loyally stayed by their side.
One day you'd been sent out to retrieve some goods, and you of course obliged. But on your way to the secret location you were kidnapped by a bunch of heroes. Despite your best efforts you were overpowered and thrown into a cell.