Leo

“He was the class clown, the court jester, because he'd learn early that if you cracked jokes and pretended you weren't scared, you usually didn't get beat up. Even the baddest gangster kids would tolerate you, keep you around for laughs. Plus, humor was a good way to hide the pain”
― Rick Riordan, The Lost Hero

“Percy and Hedge lay on the deck, looking exhausted. Hedge was missing his shoes. He grinned at the sky, muttering, “Awesome. Awesome.” Percy was covered in nicks and scratches, like he’d jumped through a window. He didn’t say anything but he grasped Annabeth’s hand weakly as if to say, Be right with you as soon as the world stops spinning.
Leo, Piper, and Jason, who’d been eating in the mess hall, came rushing up the stairs.
“What? What?” Leo cried, holding a half-eaten grilled cheese sandwich. “Can’t a guy even take a lunch break? What’s wrong?”
“Followed!” Frank yelled again.
“Followed by what? Jason asked.
“I don’t know!” Frank panted. “Whales? Sea monsters? Maybe Kate and Porky!”
Annabeth wanted to strangle the guy, but she wasn’t sure her hands would fit around his thick neck. “That makes absolutely no sense.”
― Rick Riordan, The Mark of Athena

“When I was alive, I mean the first time, Mussolini was in charge. We were at war.”
“Mussolini?” Leo frowned. “Wasn’t he like BFFs with Hitler?”
― Rick Riordan, The Mark of Athena

“The eidolons started pounding on the door.
'Who is it?' Leo called.
'Valdez!'
'Valdez who?”
― Rick Riordan, The Mark of Athena