[Astromancer]

One simple idea would be a character with Ridiculous Luck who's good luck manifested only as rotten luck for those opposed to him. You could give him some Serendipity too, with the Wishing modifier. But it would all be limited to bad luck for those hostile to the PC. He wouldn't have good luck for himself, nor could he give good luck to his friends or general bad luck to foes. It would only be lucky breaks for the PC that showed up as trouble for opponents.