"I try not to think. It interferes with being nuts" - Leo Valdez"

― Rick Riordan, The Mark of Athena

"I'm the son of Jupiter, I'm a child of Rome, consul to demigods, praetor of the First Legion. I slew the Trojan sea monster, I toppled the black throne of Kronos, and destroyed Titan Krios with my own hand. And now I'm going to destroy you Porphyrion, and feed you to your own wolves."

"Wow, dude," Leo muttered, "You been eating red meat?"

― Rick Riordan, The Lost Hero

"Gaea?" Leo shook his head. "Isn't that Mother Nature? She's supposed to have, like, flowers in her hair and birds singing around her and dear and rabbits doing her laundry."

"Leo, that's Snow White," Piper said."

― Rick Riordan, The Lost Hero

"It'll be dangerous," Nyssa warned him. "Hardship, monsters, terrible suffering. Possibly none of you will come back alive."

"Oh." Suddenly Leo didn't look so excited. Then he remembered everyone was watching. "I mean... Oh, cool! Suffering? I love suffering! Let's do this."

― Rick Riordan, The Lost Hero

"Gods of Olympus." Piper stared at Leo. "What happened to you?"

His hair was greased back. He had welding goggles on his forehead, a lipstick mark on his cheek, tattoos all over his arms, and a T-shirt that read HOT STUFF, BAD BOY, and TEAM LEO.

"Long story," he said."

― Rick Riordan, The Mark of Athena

"Leo: "So...giants who can throw mountains. Friendly wolves that will eat us if we show weakness. Evil espresso drinks. Gotcha. Maybe this isn't the best time to bring up my psycho babysitter."

Piper: "Is that another joke?"

― Rick Riordan, The Lost Hero

"I'm the Super-sized McShizzle, man!" Leo said. "I'm Leo Valdez, bad boy supreme. And the ladies love a bad boy."

― Rick Riordan, The Mark of Athena

"This is Leo. I'm the... What's my title? Am I like, admiral, or captain, or..."

"Repair boy."

"Very funny, Piper."

― Rick Riordan, The Son of Neptune

"Survive first. Figure out crayon drawing of destiny later."

― Rick Riordan, The Lost Hero

"Leo lowered his screwdriver. He looked at the ceiling and shook his head like, What am I gonna do with this guy?

"I try very hard to be annoying," Leo said. "Don't insult my ability to annoy. And how am I supposed to resent you if you go apologizing? I'm a lowly mechanic. You're like the prince of the sky, son of the Lord of the Universe. I'm supposed to resent you."

"Lord of the Universe?" (Jason)

"Sure, you're all-bam! Lightning man. And 'Watch me fly. I am the eagle that soars-" (Leo)

"Shut up, Valdez." (Jason)

Leo managed a little smile. "Yeah, see. I do annoy you."

"I apologize for apologizing." (Jason)

"Thank you." He went back to work, but the tension had eased between them. Leo still looked sad and exhausted-just not quite so angry."

― Rick Riordan, The Lost Hero

"Correct." Kekrops sounded bitter, like he regretted his decision. "My people were the original Athenians--the gemini."

"Like your zodiac sign?" Percy asked. "I'm a Leo."

"No, stupid," Leo said. "I'm a Leo. You're a Percy."

― Rick Riordan, The Blood of Olympus

"[Jason] faltered when he looked at Leo, who was mimicking taking notes with an air pencil.

"Go on, Professor Grace!" he said, wide-eyed. "I wanna get an A on the test."

― Rick Riordan, The House of Hades

"Thunder boomed overhead. Lightning flashed, and the bars on the nearest window burst into sizzling, melted stubs of iron.

Jason flew in like Peter Pan, electricity sparking around him and his gold sword steaming.

Leo whistled appreciatively. "Man, you just wasted an awesome entrance."

Jason frowned. He noticed the hog-tied Kerkopes. "What the-"

"All by myself," Leo said. "I'm special that way."

― Rick Riordan, The House of Hades

"We've arrived," Leo announced. "Time to Split."

Frank groaned. "Can we leave Valdez in Croatia?"

― Rick Riordan, The House of Hades

"This is Buford," Leo announced.

"You name your furniture?" Frank asked."

― Rick Riordan, The Mark of Athena

"Oh, by the way..." Jason glanced at Percy. "I resigned my office, gave Frank a field promotion to praetor. Unless you want to contest that ruling."

Percy grinned. "No argument here."

"Praetor?" Hazel stared at Frank.

He shrugged uncomfortably. "Well... yeah. I know it seems weird." She tried to throw her arms around him, then winced as she remembered her busted ribs. She settled for kissing him. "It seems perfect."

Leo clapped Frank on the shoulder. "Way to go, Zhang. Now you can order Octavian to fall on his sword."

― Rick Riordan, The House of Hades

"You can't burn me."

― Rick Riordan, The Lost Hero

"Leo's voice boomed over the loudspeaker: 'SURRENDER! YOU ARE SURROUNDED BY ONE SPANKING HOT WAR MACHINE!'

The giant Enceladus howled in outrage. 'Valdez!'

'WHAT'S UP, ENCHILADAS?' Leo's voice roared back. 'NICE DAGGER IN YOUR FOREHEAD.'

'GAH!' The giant pulled Katoptris out of his head. 'Monsters: destroy that ship!"

― Rick Riordan, The Blood of Olympus

'YEAH! WHO DIED? WHO CAME BACK? WHO'S YOUR FREAKIN' SUPERSIZED McSHIZZLE NOW, BABY? WOOOOOOOO!'.

-Leo Valdez Blood of Olympus