In the mirror universe, the ISS Charon was a Terran Empire starship, a colossal palace in space in Imperial Starfleet service in the mid-23rd century. The Charon under the command of Captain Maddox and contained the throne room of Emperor Philippa Georgiou. The ship was several kilometers long and powered by a star-like energy ball enclosed in its catamaran-made hull. (DIS episodes: "The Wolf Inside", "Vaulting Ambition")


Empress Philippa traveled across the quadrant aboard the Charon to confront Michael Burnham for not destroying the anti-Terran rebellion on Harlak quickly enough. Georgiou had the planet carpet-bombed, devastating a large area of the planet. (DIS episodes: "The Wolf Inside", "Vaulting Ambition")

Following this strike, the Emperor had Michael Burnham take a shuttle from the ISS Shenzhou to deliver Gabriel Lorca to her. Unbeknownst to Burnham, her captain had originated in the mirror universe and had used the USS Discovery to get back home, and had used Burnham to board the Charon in an attempt to take the throne for himself. After escaping his agony booth, he released his followers and attempted his coup. Lorca and his followers managed to take out Georgiou's followers, and take the throne room, but were undermined when Georgiou and Burnham were brought in by Lorca's troops. As this occurred, the Discovery dropped out of warp on Burnham's command and opened fire, heavily damaging the throne room. This gave Burnham the ability to drop the containment field around the mycelial sphere so the Discovery could destroy it. During this attack, Emperor Georgiou stabbed Lorca through the chest, seemingly killing him, and dumped his body through an ejection hatch directly over the mycelial sphere. As Lorca's troops re-took the throne room, Discovery opened fire on the Charon's power core, destroying it. (DIS episode: "What's Past Is Prologue")