Parasite

Parasite is the name of various supervillains who appear in DC Comics' American comic novels. Each form of the figure has the capacity to absorb the victim's life energy, superpowers, and knowledge for a brief period of time. The most frequent visitor is Rudolph "Rudy" Jones, one of Superman's greatest foes and a member of his rogues' gallery. The parasite was named the 61st Greatest Comic Book Villain of All Time by IGN in 2009.

The Rudy Jones version of the Parasite has been heavily adapted from the comics into a variety of media, most notably Superman: The Animated Series and Justice League from the DC Animated Universe. Brendan Fletcher portrayed him in Smallville, a live-action television series. William Mapother portrayed Rudy Jones in the second season of Supergirl and Anthony Konechny portrayed Raymond Jensen in the fourth season, and Rya Kihlstedt portrayed a variation of Alexandra Allston titled Ally Allston in the second season of Superman & Lois.