Also known as: ベルゼブブ(Helltaker)
The narrator from the indie game Helltaker, known as the great Fly, a grotesque bloated demonized insect that tells you the story of the man who went to hell to collect a harem.
After beating the game, you can unlock the secret ending in which Beelzebub reveals her alternate form and find the code for the artbook and pancake recipe.