Agent 355

A covert operative of the Culper Ring, a secret society serving the U.S. government, Agent 355 is a highly trained combatant and firearms expert whose true identity remains classified. She becomes the protector of Yorick Brown after a mysterious plague wipes out every male mammal on Earth.

Few characters in Modern Age comics command a room — or a post-apocalyptic world — quite like Agent 355. Debuting in the landmark first issue of Brian K. Vaughan and Pia Guerra's Y: The Last Man in 2002, she emerged as one of DC/Vertigo's most compelling presences, a cool, capable operative navigating a world turned upside down alongside Yorick Brown, Ampersand, Allison Mann, and others. Her appearances across Y: The Last Man and its compendium editions span nearly two decades of collected readership, a testament to how deeply she resonated with fans of smart, character-driven storytelling. If you haven't spent time with Agent 355, you're missing one of the defining figures of her era.