“Good fighting with you, Seaweed Brain."
Ditto.”

“Happy Birthday Seaweed Brain”

“You promised, Seaweed brain. We would not get separated! Ever again!”

“Annabeth: Hey, Seaweed Brain.
Percy: Will you stop calling me that?
Annabeth: You know you love it.”

“I am never, ever, going to make things easy for you, Seaweed Brain. Get used to it.”

“What if it lines up like it did in the Trojan War… Athena versus Poseidon?"
"I don't know. But I just know that I'll be fighting next to you."
"Why?"
"Because you're my friend, Seaweed Brain. Any more stupid questions?”

“You've got something to say to me, Seaweed Brain?"
"You'd probably kick my butt."
"You know I'd kick your butt.”

“Percy: Don't I get a kiss for luck? It's kind of a tradition, right?
Annabeth: Come back alive, Seaweed Brain. Then we'll see.”

“I've been waiting a long time for a quest, seaweed brain," she said. "Athena is no fan of Poseidon, but if you're going to save the world, I'm the best person to keep you from messing up.”

“My fatal flaw is hubris.
The brown stuff they spread on veggie sandwiches?
No, seaweed brain. That's hummus. Hubris is worse.
What could be worse than hummus?”