Mr. Immortal

Few characters make their Marvel debut with quite the same offbeat charm as Mr. Immortal, who first crashed onto the scene in Avengers West Coast #64 in 1990, courtesy of Terry Kavanagh and Chris Wozniak. A Copper Age original, he's spent his comics life in gloriously unconventional company — sharing pages with the likes of Squirrel Girl, Flatman, Doorman, and Big Bertha in titles like G.L.A. and the delightful GLX-Mas Special, the kind of roster that signals you're in for something wonderfully different from standard superhero fare. His catalog footprint is small but cult-worthy, the sort of character whose every appearance feels like a discovery waiting to happen for the right reader.