Angels are not part of Buddhism as it supports no supernatural
pantheon of gods. However the story of Mara the Lord of Death is
part of the Buddhist mythology, possibly from popular (but now
forgotten) folklore . Mara is present in is part of Vedic Brahmanic
traditions and other traditions such as the Jains. Mara represents
the forces and temptation. Mara may have had more than one
precedent in pre-Buddhist mythology. For example, it's possible he
was based in part on some now-forgotten character from popular
folklore such a drought demon of Vedic mythology named Namuci.