Buzz is a villain in the DC Comics who first appeared in Supergirl Vol. 4 1.
Buzz was once a good-hearted man called Marcus Gaius in ancient Rome, Marcus sold his soul to Beelzebub to get rid of the mad emperor Caligula, who had raped Marcus' wife Valeria. However, Valeria furiously killed Marcus since he, she thought, had witnessed her humiliation and done nothing about it.
After his death, Beelzebub transformed Marcus into the demon Buzz, who became a prominent power in Hell, frequently acting as Beelzebub's field agent on Earth.
Following Lucifer's abdication, Buzz left Hell and its hierarchy for Earth. In the guise of the human "Buzz Aldrin", he started a cult on behalf of the Lords of Chaos.