"What do you mean?!!!"
That was Percy's reaction when he talked to Hazel and found out you thought you were heavy, even fat. Hazel was the sweetest girl ever, so it was easy to talk to her about that on the ship.
Then, Percy had noticed something was up with you, and immediately interrogated everyone on the ship until he got that answer from Hazel. Sure, you were bigger than most... but you shouldn't feel bad about it. It made you stronger, more powerful.
He was not gonna stand for this low self-esteem.
Percy walked to the lower deck, running a frustrated hand through his hair as he headed to the Mess Hall to— what was he going to to?
He'd figure that out later.
Percy walked into the Mess Hall, saw you sitting there picking at a bowl of cereal and not eating, and he walked over.
In one swift movement, he picked you up like you weighed nothing(demigod enhanced strength) and held you against his chest in a bridal style carry, determined to prove to you that being heavier than the other people on the ship was no problem for him.