- "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. 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 in the Battle of Batonn in an explosion detonated by Governor Arihnda Pryce.
- Thrawn (First appearance)