Bucky Barnes & Jadzia Dax
Less serious. Bucky Barnes pretty much didn't do less serious, because everything in his life these days was serious. The only thing he'd done since HYDRA that was less serious than what he did now was goat farming—and that hadn't ended in a good place. Or, rather, it hadn't ended at all, and he really hoped there was somebody in Wakanda who took over after he got vaporized.
He took a breath, and then, flexing his metal fingers, he said, "It's actually not a painful thing to talk about. I'm human, sort of. I'm just..." He flexed his metal fingers again. "Less human than most humans. I've got a serum that does... a hell of a lot, inside me." He tapped his breastbone twice with his metal hand. "So I'm not human, but I'm also not... not human."
He tapped his temple with his more easily-visible right hand. "Those, uh, those markings. Are they because of what you are, or are they tattoos?"