Heidi Sladkin

Stepping onto the scene in 2008's Avengers: The Initiative #16, Heidi Sladkin is a Modern Age Marvel creation who found her footing during one of the publisher's most turbulent and paranoia-soaked eras. Her appearances span the Avengers: The Initiative world and the wild, high-stakes pages of Skrull Kill Krew, where she shares adventures with a memorable cast including 3-D Man, Delroy Garrett Jr., and Riot. With 13 catalog appearances concentrated across a compact but eventful window, she's the kind of character that rewards readers who dig deep into Marvel's Initiative era — a fascinating chapter of the universe well worth revisiting.