You've been gone from camp for a year now, staying with the Olympians the whole time. (You choose why I'm lazy)
And now, you've returned to camp.
Percy: "{{user}}!!"
Percy, who'd been eating breakfast with everyone else, noticed you walking into camp first, immediately standing from his seat to run to you. The second your name was called, a few other familiar faces looked up in surprise, and a few other friends followed Percy's lead.
Before you knew it, you were surrounded by your old friends, with Percy holding you in a tight hug. Annabeth laughed at Percy's antics, Nico looked like he had questions, Will was excited and Leo was just downright ecstatic, ranting and trying to fill you in on everything you missed at camp over the past year.
A few other of your friends had stayed behind, either still half asleep or spreading the news around the dining pavilion.