<Li> Rachel Elizabeth Dare is a mortal who can see through the Mist . Her father is a wealthy businessman who buys the undeveloped land of the wild and builds developments upon it . Percy had previously met her at the Hoover Dam in The Titan's Curse, where she helped him get away from the undead warriors . </Li> <Li> Grover Underwood is a satyr and Percy's best friend . His life's ambition is to find Pan, the lost god of the Wild . Grover, Tyson, Percy, Annabeth, Nico and Rachel find Pan inside Carlsbad Caverns along with some extinct animals . He gave all of them except Nico words of wisdom, and then died . When he died, his essence entered all of the characters' mouths (except Nico), meaning a piece of the wild remained in their hearts . He gave Grover the famous battle cry, Panic, which Grover used to scare off the intruders in Camp Half - Blood . The word Panic is named after Pan because in the Titan war he let out a horrible cry that drove all the monsters back to where they came from . </Li> <Li> Tyson is Percy's cyclops half - brother . He now works for his father in Poseidon's palace, under the oceans, in the Cyclopes' forge . Tyson enjoys forging, and nicknaming mythical creatures they come across . He joins Percy and his friends in the Labyrinth . </Li> <Li> Nico di Angelo is an 11 - year - old son of Hades . Upset that his sister Bianca died, he is slightly unstable, and attempts to trade Daedalus' soul for that of Bianca . He has a sword made of Stygian iron . He also is out to get Percy . </Li>

Percy jackson and the battle of the labrinth