[ He feels like a literal monster and metaphorical monster both, in listening to Chloe and relating it to his own situation, nodding slowly, numbly. ]

Knowledge is something you can choose to act upon- knowledge on its own... isn't evil. But I... Thanatos only needs two ways to kill. It has a sword, and it can use magic. When I'm Thanatos, sometimes I lose grasp of myself and I lose that choice, Thanatos acting more on instinct than anything else.

[ It sounds more and more like an excuse when he says it, not being in control of one's own body. ]