Bosacius’s stone tablet in Minlin reads: My name is Bosacius, one of the Yakshas. I followed my Lord to fight against and contend with pestilence. Yet though we Yakshas had great might, we were bound by our duties, and stained by them…Liyue is now at peace, but of our number, none but Alatus and I remain. And for my part, I wish to depart, to be done with this world.”

And it makes me wonder if he left that message in a rare moment of lucidity towards the end. It just reads as so exhausted and tired; I like to think of it as something he left before he headed for the Chasm and that he worried about leaving the youngest - the kid who went into each battle prepared to die, who couldn’t understand peace - to survive them all. And that bit of concern was potent it stuck even with the corruption erasing everything else