K.O.

Born in the gritty Bronze Age of Marvel Comics, K.O. made their debut in Daredevil #161 in 1979 — right at the dawn of Frank Miller's legendary association with that title, with McKenzie and Miller themselves as creators. That's rarefied company to be born into, and K.O. has lingered in the orbit of Hell's Kitchen ever since, sharing pages with Daredevil, Black Widow, Ben Urich, and Matt Murdock across nearly three decades of appearances. With a presence stretching from 1979 all the way to 2008, this is a character quietly woven into the fabric of one of Marvel's most celebrated corners — a small but persistent thread in a tapestry that collectors and Daredevil devotees know to treasure.