Centaurs live in the woods around camp. They are friendly and often hold parties with satyrs and help other campers. They occasionally go on quests, but usually are content to live in their tribes in the woods, where they practice their archery. They are amazing at that. They are friendly with the Poseidon (because he is the God of Horses too) and Apollo cabins (archery). They also like Pan's campers. They enjoy having shooting contests with the Apollo campers.
They can also be moody sometimes- then it's better to stay away. They become the Party Ponies in the violent way.