Headcannon not by me:

Annabeth once found Percy in front of a mirror.

"Mirror, mirror on the wall, who is the sassiest of them all?" He asked while striking a pose.
Annabeth couldn't help but stare as Percy made different poses i front of the mirror.

"That,a right! Percy Jackson is the sassiest of them all!" He yelled.

Annabeth came in laughing while Percy closed the door.

"DON'T TELL ANYONE! Wise Girl, be wise and keep this secret!" He pleaded as Annabeth laughed, rolling on the floor.

This ended with Percy handling all of Annabeth's duties for a month.

HAPPY THANKSGIVING TO ALL THOSE CELEBRATING!