Uh...I think it's pretty obvious that you didn't finish the series, so, you should probably refrain from asking questions about the end unless you really want stuff to be spoilt.
Ax went back to his home planet after being made a Prince. He spent several years chasing the Blade ship, which had escaped with a morphing cube after the war. He was lured into a trap by them and possessed by an entity known as The One. He is presumed dead after Jake gave an order to hit the Blade ship with his own vessel, presumably killing all involved.