George

George is a snake that was caught by Hermes. He is immortal, though he is not a Monster. Demigods and Gods can hear him in their heads. He is always seen with Martha.

Description
George is a snake that loves rats, and is sometimes rude. They live on Hermes' Caduceus. When it is a phone, he is on the antenna.

The Sea of Monsters
In The Sea of Monsters, Percy goes to the lake. Hermes comes, and George is with him. He is constantly saying "Rats are delicious!". At the end, he teases Percy, asking him first if he brought him a rat, then a guinea pig.

The Last Olympian
In The Last Olympian, George comes with Hermes to Olympus to deliver a message. George and Martha tell him not to.