Aubrey Plaza’s Death has the opportunity to cross paths with many MCU characters following her debut in Agatha All Along. Marvel Studios has recently introduced a number of powerful cosmic entities to the MCU, including the likes of Eternity, the Living Tribunal and the Watcher, and Agatha All Along debuted yet another. Adapted from Lady Death, who made her Marvel Comics debut in 1973’s Captain Marvel #26, Aubrey Plaza brought Death into the MCU, who was revealed to have had a centuries-long love/hate relationship with Kathryn Hahn’s witch, Agatha Harkness.
https://screenrant.com/lady-death-mcu-characters-meet-want-after-agatha-all-along/