Satan

Satan also goes by Morningstar or Lightbringer.

A powerful angel skilled in mimicry and manipulation, able to disguise himself as God. For unknown reasons cannot enter Heaven himself, but sends his human followers to attempt a heist in episode 4. He is skilled enough to craft advanced amulets that successfully protect and mask said followers.

It is implied that he has a familiar relationship with God, calling them "old friend" in episode 6. Satan initially wanted to flood the entire earth, but God negotiated it down to just a valley. God gives Satan explicit permission to cause Noah's flood.

Low regard for life, especially humans.