|Universe||Ben 10 Universe|
Revonnahgander are violet skinned humanoid aliens with pointed elf-like ears.
Revonnahganders are violet furred aliens with pointed elf-like ears. Young Revonnahganders have tails, which fall off at puberty. Their hair can be black, white, or purple. They have cat-like pupils and large pointed upper canines.
- As opposed to Western naming conventions, Revonnahgander's names are ordered like those of people from Asia and East Europe, with the family name first and the given name second.
- Revonnahganders are not given names until they reach a certain age.
- According to Derrick J. Wyatt, Revonnahganders are even less known than humans and Rook is one of the few.