Walter Rosen

Walter Rosen made his Marvel debut in The New Mutants Annual #7 in 1991, stepping onto the page during the Copper Age when the X-Men corner of the Marvel Universe was at its most expansive and electric. Over a span of roughly 25 years, this quietly persistent figure accumulated appearances across titles like X-Men: Fatal Attractions and The New Warriors Annual, sharing pages with heavy hitters like Wolverine, Captain America, and Toad — serious company by any measure. With eight catalog appearances including one recognized key issue, Walter Rosen is the kind of understated discovery that rewards the dedicated back-issue hunter willing to dig beneath the marquee names.