Baen is a massive amüli and a master caster--one who directs a group of magicians. He has a knotted red beard and shoulder-long red hair, which he ties back with a strip of leather. Wings of ruddy red and brown help him fly from deck-to-deck on the sky ship, and he takes orders from no one other than Captain Melroc. The two are close friends, and as the story progresses, it’s revealed that Baen sustained magical wounds during a battle, and that the injuries cannot be healed. Magic can’t heal magical ailments, and so, as the wounds spread closer to his heart, he becomes frailer.
After an accident aboard the sky-ship which magic would have helped prevent, Baen offers to teach Frendyl some magic. Baen’s an honest, at-face-value person, and doesn’t hide how he feels or who he cares about. When he’s upset, he shows it, such as when Frendyl casts a spell before he’s ready and injures himself if the process.