Ellen

“Behold!" Percy shouted. "The god's chosen beverage. Tremble before the horror of Diet Coke!”
― Rick Riordan, The Mark of Athena

“Frank stared at him. "Unfair? You can breathe underwater and blow up glaciers and summon freaking hurricanes-and it's unfair that I can be an elephant?"
Percy considered. "Okay. I guess you got a point. But the next time I say you're totally beast-"
"Just shut up," Frank said. "Please."
Percy cracked a smile.”
― Rick Riordan, The Son of Neptune

“Like water leaking through a dam," said Piper.
"Yeah," smiled Percy. "We've got a dam hole."
"What?" Piper asked.
"Nothing," he said. "Inside joke.”
― Rick Riordan, The Mark of Athena

“Very slowly using two fingers, Annabeth drew her dagger. Instead of dropping it, she tossed it as far as she could into the water.

Octavian made a squeaking sound. "What was that for? I didn't say toss it! That could've been evidence. Or spoils of war!"

Annabeth tried for a dumb-blonde smile, like: Oh, silly me. Nobody who knew her would have been fooled. But Octavian seemed to buy it. He huffed in exasperation.

"You other two..." He pointed his blade a Hazel and Piper. "Put your weapons on the dock. No funny bus--"

All around the Romans, Charleston Harbor erupted like a Las Vegas fountain putting on a show. When the wall of seawater subsided, the three Romans were in the bay, spluttering and frantically trying to stay afloat in their armor. Percy stood on the dock, holding Annabeth's dagger.

"You dropped this," he said, totally poker-faced.”
― rick riordan, The Mark of Athena