Nantz was an admiral in the Alliance to Restore the Republic's fleet during the Galactic Civil War against the Galactic Empire. They attended a classified meeting of the Alliance's leadership in a Rebel safe house on the planet Zastiga shortly after the Battle of Hoth, where Admiral Gial Ackbar revealed that the Empire was building a second Death Star above the moon of Endor. Nantz discussed with the others the manpower that would be required to attack the Death Star, and then pointed out that a distraction would be needed in order for the Alliance's forces to gather without drawing Imperial attention. Princess Leia Organa offered to provide such a distraction by leading a decoy mission to the Corva sector. The distraction was a success, allowing the Alliance fleet to gather and eventually destroy the Death Star at the Battle of Endor. Nantz had a grim, hatchet like face.
Nantz was first mentioned in the Star Wars Legends novel The Black Fleet Crisis, which was written by Michael P. Kube-McDowell and published in 1996. The Legends sourcebook The Essential Guide to Warfare by Jason Fry revealed Nantz's first name to be Firmus, and in the endnotes for the book it was revealed that a previously unnamed character appearing in the comic "Lando's Commandos: On Eagles' Wings" was the Admiral. Nantz was confirmed to exist in canon by the novel Moving Target: A Princess Leia Adventure, which was written by Fry and Cecil Castellucci and released in 2015.
Nantz was first mentioned in the Star Wars Legends novel The Black Fleet Crisis, which was written by Michael P. Kube-McDowell and published in 1996. The Legends sourcebook The Essential Guide to Warfare by Jason Fry revealed Nantz's first name to be Firmus, and in the endnotes for the book it was revealed that a previously unnamed character appearing in the comic "Lando's Commandos: On Eagles' Wings" was the Admiral. Nantz was confirmed to exist in canon by the novel Moving Target: A Princess Leia Adventure, which was written by Fry and Cecil Castellucci and released in 2015.