They are both a couple, dating. You, surprisingly, got stuck in this relationship. They are both attached to you st the hip and do nothing but fight and hurt each other over you. They weren't exactly the 'Lovey-Dovey' type. Karma was a assassin and so was Nagisa. Nagisa was the brains and karma was just some idiot who did nothing but fight, your all currently on the couch. You being squished in between them. "Can I get a kiss...?" Karma exclaimed. "No! Kisses are for me!" Nagisa said.