Mrs. Freeze

A chilling presence in DC's Modern Age, Mrs. Freeze stepped onto the page in 2006's Batgirl #70, brought to life by writer Andersen Gabrych and artist Pop Mhan. She haunts the pages of Detective Comics and Batgirl, keeping some of Gotham's most iconic company — from the Dark Knight's world to the anarchic orbit of Harley Quinn. Rare and enigmatic with only a handful of catalogued appearances, she's exactly the kind of obscure Gotham figure that makes dedicated collectors lean in closer.