"For fun, really?" Koumyou's laugh is still tired, but there's a little of that usual bubbliness in there, too.

"..I don't know what sort of powers this cat may have. I just don't want to have to kill it."

That would be unspeakably sad, to get a new pet and immediately have to murder it. Fitting, for someone from his world. For someone afraid to show too much love to anyone or anything, lest they immediately be snatched away.

Bad enough to even have to already be contemplating the possibility.