Seraph

A mysterious figure who stepped out of the shadows in Chris Claremont and Jim Lee's legendary Uncanny X-Men #268 in 1990, Seraph is one of Marvel's more elusive characters — appearing in a small but significant handful of issues that put her in remarkable company, sharing pages with Wolverine, Captain America, and Baron Strucker across a wartime-tinged espionage narrative. Her debut issue is celebrated enough to have earned a facsimile edition, a testament to how beloved that Claremont/Lee era remains among collectors. With only a handful of catalog appearances, Seraph is the kind of deep-cut Marvel mystery that rewards the dedicated reader willing to dig into the rich, shadowy corners of Logan's past.