[ Should she try and touch it, he would catch her hand with his and gently bring it away. He watches her closely though, careful so that she's kept away from the darkness. ]

It is the essence of a powerful being. I would not get any closer to it, else you may sully your hands and may feel unwell.

[ Just a precautionary measure, even if it won't happen. Since he keeps the essence protected in himself, then it shouldn't hurt anyone else. This was a necessary action he had to do, otherwise, his brother would have been controlled by his enemy by now. ]

To keep it from harming those I love, I've sealed it within myself.