Clownpiece (yeah, that's her official name) is a surprisingly powerful fairy who is a servant of the Hell Goddess Hecatia. This psychotic fairy was loaned to the divine spirit Junko in order to serve as an asset towards a hostile relocation plot to the Moon-dwelling Lunarians, as since Clownpiece is an embodiment of pure life force, which also leads to death, she is too powerful for the Lunarians and their impurity destroying weapons. The American flag-like outfit doesn't indicate her nationality. Rather, it serves to mock the Lunarians, as they are not very fond about the Apollo Project.