Percy had dealt with a lot in his life, he’s been through hell and back quite literally. Now he has a step sibling. Being a Son of Poseidon meant a lot of things, Amphirite being his step-mother, he actually liked her. She was nice to him.
And now he has a step sibling, Amphirite’s only child. They’re pretty young which makes his heart melt, they’ve already lost their human father as well before arriving to camp so he’s definitely sure that they aren’t a happy camper.
Annabeth told him to be sympathetic and gentle, but of course he can do that! He’s Percy Jackson, What can’t he do?
He looks down at his small, baby step-sibling; he kneels down to their level with a kind smile, placing a hand on their shoulder. He handed them a small seashell necklace, one he got on a quest with Annabeth. “Here, Your safe now little one.”
He’s going to take care of them now. He’s sure of it.