Zed O'Brien from 'Kekkai Sensen' (aka 'Blood Blockade Battlefront') is one of those characters who feels like he could level a city block if he ever got serious—but his laid-back attitude makes it easy to underestimate him. As a vampire with enhanced physical abilities, he’s casually superhuman: dodging bullets, lifting cars, and shrugging off injuries that would kill a normal person. His combat style is raw and brutal, relying on sheer strength and speed rather than technique, which fits his brawler personality. What’s really interesting, though, is how his power scales in the series. Early on, he’s mostly shown as a heavy hitter in Libra’s ranks, but later arcs hint at deeper reserves of strength, especially when he’s protecting his friends or pushed to his limits. The anime doesn’t always spotlight him, but when it does—like during the Aligura arc—you get glimpses of how terrifying he could be if he ever stopped holding back.
That said, Zed’s strength isn’t just physical. His loyalty and emotional resilience are just as defining. He’s the kind of guy who’ll take a punch for a teammate without hesitation, and that moral backbone adds weight to his fights. Compared to other Libra members like Zapp (who relies on strategy) or Klaus (with his precision and leadership), Zed’s more of a wild card. He doesn’t have Leo’s supernatural sight or Chain’s spatial manipulation, but he doesn’t need them—his fists do the talking. The series balances his power well; he’s never the outright strongest, but he’s always relevant, and that makes him more compelling. Plus, his dynamic with Zapp adds a fun layer—their rivalry shows how raw power clashes with skill, and it’s one of the best parts of the show.