Blackjack O'Hare is a mercenary from Halfworld and leader of the Black Bunny Brigade. Working for the highest bidder, he worked for Judson Jakes and Lord Dyvyne, both rivals in toy production. After Judson attacked Dyvyne and started a war between them, Blackjack was sent to kidnap Lylla, heiress to Judson's company.
Once he captured his target, the crafty Blackjack kept her for himself in an attempt to marry her and gain control of the company for himself. When Dyvyne retaliated, Blackjack and Rocket Raccoon
teamed up to help save each other from the toy companies attacks. After playing nice with the good guys and helping them escape, he again turned on those who trusted him with a new team - Blackjack O'Hare and His Awful Eight. His team was nearly defeated and Rocket and his friends escaped.
Blackjack appeared again in the final battle of the war, saving Rocket Raccoon and having a change of heart. He left with them and the robots for a new life on another planet.