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

“Get up seaweed brain”

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

“Happy Birthday Seaweed Brain”

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

“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.”

“If desire did not dim the brain, nobody would ever get married, drunk, or fat.”

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

“For what it’s worth: trust your feelings. I can’t promise that you’ll never get hurt again, but I can promise you the risk is worth it.”

“They say that the truth will set you free
But then again, so will a lie…
It depends if you're trying to get to the promised land
Or if you're just trying to get by.”