"You are very pretty," Kaeya said, plopping down in front of the child.
"Kaeya," Diluc scolded, "Boys are /handsome/, girls are /pretty/."
"It's okay," They said, looking up for the first time. Their eyes were blue, strikingly similar to his own, even down to the star pupil. "I don't mind being called pretty."
--
Aaah, I know that Albedo doesn't have those eyes but I'm the author and what I say goes. Also note, Albedo goes by they/them when written, but not spoken about, due to them having the outward appearance of a boy. They are probably too young to realize they're enby, but they are aware that going by he/him doesn't feel right. Regardless, they don't quite know yet that there are other pronouns, but they do when they are older :)