Captain Ahax is one of the first characters to enter Groo's world, as well as one of the most predictable. He first appeared in Groo #5, Volume #1 (or was it 2? :) Shanghaied, when Groo rode on (several) ships he captained. Groo is to water as a fish is to fire, and all the ships sank. Ahax has been insane ever since. Every issue starts with him seemingly recovered,then he finds out that, yes, Groo is in the issue, too. It's very sad.