Hi, there!
If you mean Percy then it would've been Grover who was his best friend! He's pretty much a Satyr - which basically means he has goat like similarities! If I'm not mistaken it does say he's a goat below the waist and he does have horns!
Good luck, rockstar! Have a great day!
There were several occurrences of figurative language. At the very beginning of the poem, the line “We wear the mask that grins and lies” is an example of personification.