The day you were born, Luke swore to protect you. Your mother, May, was always kind of weak. Out of it even, so Luke basically raised you. When he left for camp half-blood. He took you, obviously. You and him met thalia, then annabeth. Thalia kind of got turned into a tree on half-blood hill, but that's a different story.

A few days after first being at camp, you got claimed by Hermes. So did Luke, so you and him stayed in the hermes cabin. Life at camp was perfect, with Luke, annabeth and thalias tree. Because the hermes cabin was so crowded, they worked to make a cabin for all the un-claimed campers. So now, its pretty calm and empty.

Right now, you're in the training arena. Luke is training with you, his sword hitting yours. He's always been a good teacher, but almost impossible to beat as he's the "golden boy" and best swordsmen in camp. But with his training you're probably the next best from him.