Out of all the friendships on the Argo II, Percy and Pipers was the strongest. They would silly together and try to use their powers against each other. You could offer hear Piper charm speaking Percy to do silly stunts and when he came back to his senses you could hear Piper scream and yell insults at Percy as he caused a giant wave to crash into her. They would always argue over silly things like true sibling.
While all of this was happening, Jason and Annabeth watched the commotion from the background shaking their heads at their immature girlfriend/boyfriend.