"I'm sorry. Grover moaned I'm a failure. I'm-I'm the worst satyr in the world. (p.59) Grover is blaming himself for being a failure and the worst satyr in the world.
Character vs. Technology
"They surrounded me, and Clarisse thrust me with her spear." (p.120) Clarrise had half of her team to surround Percy so she could stab him with her sword.
Character vs. Nature
*Makes cherry coke magically appear*
I just wished my father could magically make a phone appear.
"Or maybe they were just staring at Annabeth, who was pretty much dripping wet." (p.93) Some kids at the camp were staring at her because she was wet.
Character vs. Supernatural
"The water stayed on her like the spray from a fire hose, pushing her backward into a shower stall." (p.91) The water splashed on Clarisse and it was so strong that it pushed her into the shower stalls.
"Dionysus could make diet coke appear out of thin air. Why couldn't my dad, who-ever he was, make a phone appear." (p.108) This means that Percy wants his father to make a phone appear because he wanted to make a phone call.
"A three tipped spear: a trident. your father Annabeth murmured this is really not good. It is determined Chiron announced. All around me campers started kneeling, even the Ares cabin, though they didn't seem happy about it. My father? I asked Poseidon said Chiron Earthshaker, Stormbringer, father of horses, hail, Perseus Jackson, son of the "Sea God." (p.126) Percy found out that his dad is poseidon God of the Sea.