Companions are specially trained animals that can go with you wherever you go. Even the Pack Animals and Horses are well mannered enough to accompany you to meetings and social gatherings. They are neither cheap nor simple to train, so their trainers are a little careful with who can equip one. Companions are linked to the Primary class ability paths, so most characters will only ever gain access to one category of Companion and will not be able to equip two at once. Lords are the exception, and will eventually be able to equip a Falcon along with their Primary Class associated Companion.