Karel Sorensen

A Silver Age discovery from the pages of DC's Mystery in Space, Karel Sorensen made her debut in 1963 under the hands of Jack Schiff and Sheldon Moldoff, stepping into a cosmos populated by the likes of Star Hawkins, Ilda, and Rick Purvis. With appearances stretching across five decades into 2015 — touching titles as varied as Threshold and Twilight — she's a quietly enduring figure in DC's science-fiction universe, the kind of character who rewards the dedicated back-issue hunter. Twenty appearances may sound modest, but for a Silver Age original still turning up well into the 21st century, that's a testament to a character with genuine staying power worth tracking down.