"I lost it later. And the arm was a gift I got not that long ago." He doesn't sound bothered by the loss, especially compared to the reverence with which he says the arm was a gift. It's not so much the loss of function that would bother him if his arm was destroyed, though that would make things a little more complicated, it's the loss of the arm that was made just for him.

"I'm not entirely certain, but Ferryman-san said these were from an earlier group of souls like us. Unfortunately, we can't read them, and Ferryman-san declined to translate, but it would have been a shame to simply leave them there, don't you think?" And so he stuffed his hoodie full of them. "Sunny-kun helped as well!"