Odyssey is a loose assortment of rovers, road agents, and ragpickers, travelers and troubadours, vagrants and vagabonds, wanderers and wastrels. They are one of several guilds known to be part of Bear and Friends. Notably, they bring the bear. They enjoy repeatedly pummeling Prince Kael'thas in Heroic Magisters' Terrace in the hopes of stealing the lunch his mom packed for him, prank calling hostage Pit Lords in Hellfire Citadel, and ringing Malchezzar's doorbell and then running away.
They are not recruiting, but they may be willing to help you kill something if you ask nicely and offer them pie.