She saves lives like she has nothing to lose. He saves the world like he has everything to protect. She’s Gotham’s unregistered vigilante reckless, brilliant, too willing to bleed. He’s Metropolis’s symbol of hope-controlled, patient, impossibly powerful. They fight for justice. They fight each other. They don’t know they’re also coworkers at the Daily Planet. Superman calls her a danger. She calls him a coward. Everyone else calls it tension.