Nico gives off a little salute. "You got it."

He watches as someone comes up from the water and seems to be failing on swimming. Why they went out there in the first place befuddles him. "Go get 'em, lifeguard."

The demigod will only linger on the beach long enough to make the saving is a success, and no one comes close to death before heading back into the hustle and bustle of the city.