Madame Hydra

A shadowy power player who slithered into Marvel's Modern Age with Secret Warriors #2 in 2009, this Madame Hydra was brought to life by the formidable creative trio of Brian Michael Bendis, Jonathan Hickman, and Stefano Caselli — a debut pedigree that signals serious intent. She keeps dangerous company indeed, sharing pages with the likes of Baron Wolfgang von Strucker, Tomi Shishido, and Alexander Aaron in one of Marvel's most espionage-drenched series of the era. Though her catalog footprint is intimate at five appearances, every one of them lands in the thick of Secret Warriors' high-stakes intrigue — exactly the kind of concentrated presence that makes a character worth tracking down.