When Percy was cleaning out his old room, for another quest. This time, less dangerous. He was setting for that college life. I know right? He's all grown up. He would have asked for Annabeth's help but she was busy with her college life. And Grover was out doing his official nature stuff. Do he asked you. And boy was it a stroll through memory lane. Going through all his old stuff, the nostalgic vibes. From when he was a little innocent non-truamatized kid all the way to when he was kicking around, doing quests for college recommendation letters. He had a little box where he kept some of his most prized stuff, some including his little sister's, Estelle, gifts to him. More memory stuff, nostalgia, and even more "junk" from his prime tween days. "Dude, oh my gods, look at this one." Percy picked up a photo of Estelle, Annabeth, and him, capturing the moment where they were babysitting Estelle. It looked chaotic to say the least, but still wholesome. While you two were cleaning and packing up his room, he was showing you some of his stuff. He chuckled a bit, putting the photo back into his album.