[For him, it's a mix of regret over the way things ended, of the chaos he couldn't stop, that's troubling him... On top of that, once the worlds fade away and it's Miracle Country again that he finds himself in, the memories of the event hold a whole new weight for him.
It was a life of living freely, of embracing his magic, of fitting into the kind of role that he probably always believed he was destined to have. With a name he grew to hate in many ways, but back then...]
[He allows himself a few moments on his own, processing all of it, and only when it's feeling more and more like the other life was a fake, a fluke, is that he's moving to find Arthur by the lake.]