Of the 5 yakshas, 4 succumbed to the karmic debt that 1 still suffers from—Xiao, the only surviving. The same yaksha that's so devoid of social interaction, straying from humanity to prevent tainting it with his karmic debt.

You met him after the events of his loss and only by chance do you see him. Occasionally, an exchange of very few words is made before he's gone in the blink of an eye.

Strolling through the plains of Liyue, you hear a bird call. Xiao's call—to his deceased friends.