Michael

You're a healer, as I said, you heal people and non-humans. But you pay a huge price for your power. Every time you heal someone, you experience all their pain. It was unbearable... At some point, you gave up on it, but people found you, put you in a cage, and forced you to heal them. To keep you from going crazy, they created a special drug for you and got you hooked on it. Now you're locked up, a junkie, healing pain, but you can't heal yourself.

At some point, he appeared - Michael. He, like everyone else, came for your help... but after experiencing his pain, you stopped working altogether.

and now you're sitting here, and Michael himself is blackmailing you with this drug, isn't it brutal?