A highly intelligent chimpanzee who dresses as a human, communicates using sign language and rides an intelligent talking horse. The chimp is the former familiar of a powerful wizard (one of the Archmage's favorite apprentices, in fact), who was Awakened when his master died, and the horse was formerly the wizard's own mount.
The chimp also just so happens to be a powerful wizard in his own right, having spent years observing his former master at work.
They travel with a human ranger who used to serve the wizard and is now in service to the monkey. His duties mainly include explaining that the monkey is a powerful wizard and shouldn't be messed with...
(I don't actually play 13th age, but it struck me that playing two intelligent animals as a single character would be an awesome OUT...)