Quill

A minor but memorable piece of late-'80s Marvel texture, Quill debuted in 1988's Captain America #343 — a Copper Age creation from the legendary Mark Gruenwald and Kieron Dwyer during their celebrated run on the Star-Spangled Avenger's title. With only a handful of catalogued appearances spread across Captain America, Avengers Spotlight, and Fantastic Four, this is a character whose footprint is small but whose company is anything but — sharing pages with Captain America himself, Johnny Storm, and Dennis Dunphy, among others. For collectors who love hunting the corners of the Marvel Universe where the era's grittier, street-level energy lived, Quill is exactly the kind of hidden gem that makes late-'80s back-issue diving so rewarding.