The Monitor or Over-Monitor, also known as Mar Novu, is a fictional character created by writer Marv Wolfman and artist George Pérez as one of the main characters of DC Comics' Crisis on Infinite Earths limited series.

The Harbinger is a superheroine appearing in publications by DC Comics. Created by Marv Wolfman and George Pérez, she first appeared in her civilian form in The New Teen Titans Annual #2 before taking on the mantle of Harbinger in Crisis on Infinite Earths #1.