Boudacians are the alien warrior-race that Princess Mandie hails from.
Very little is known about Princess Mandie's actual race. However, they are shown to have destructive tendencies as evidenced by Princess Mandie herself, and a visual sequence showing their intent to destroy Earth alongside the Yugopotamians.
Female Boudacians are greenish-yellow skinned, have lavender colored hair, and two bug-like antennas on their foreheads and triangular teeth. They are considered very beautiful by human and fairy standards, but hideous by the backward Yugopotamian standard. Male Boudacians have red eyes and brown hair all over their bodies, making them look like werewolves.