CosmicGallantmon is a Vagabond Digimon whose English name comes from the word "cosmic" and Gallantmon, where its Japanese name originates from the word "space" and Dukemon. It is said that the spirit of a fallen Gallantmon has chosen the TechGaomon due to its undying and genuine admiration for the Royal Knight, allowing it to don its armor and a rocket-sword hybrid called "Stardust Crusader".