- "To defeat an enemy, you must know them."
- ―Nevil Cygni to Thrawn
Nevil Cygni (also known as Nightswan) was a male human who became the personal nemesis of Thrawn in the years that led to the latter's rise to the rank of Grand Admiral in the Imperial Navy. He took this name from the bird, Nightswan. Originally a criminal mastermind who worked as some sort of consultant, Cygni ended up settling down with a single organization, one that opposed the Galactic Empire. Cygni was killed, among dozens of other civilians, in the Batonn insurgency in an explosion detonated by Governor Arihnda Pryce.
- Thrawn (First appearance)