Jupiter serves as one of Team Galactic's three primary Commanders in the Sinnoh region, operating directly under Cyrus. She possesses distinctive purple hair styled into buns and purple eyes, wearing the standard Galactic uniform of white fabric with black sleeves and kneepads, featuring an exposed left thigh. Her personality blends strategic calculation with egotism and vindictiveness. While more levelheaded than Commander Mars, she exhibits pronounced cruelty and fanatical devotion to Cyrus's ideology, willing to perish for his goal of creating a new world. She openly questions why the Lake Trio chose Ash, Dawn, and Brock as protectors over Team Galactic's Commanders. Her strategic aptitude is shown through training Pokémon moves specifically to counter type weaknesses. Her anime operations begin with a mission alongside Mars to retrieve the Lustrous Orb from Celestic Town, where she ambushes Team Rocket to reclaim the orb using her Skuntank and secures Galactic's retreat. Later, at Fuego Ironworks, she captures the undercover agent Looker and apprehends Team Rocket during their rescue attempt. Confronting Ash and friends, she questions their Lake Trio connection before escaping and leaving a data-crippling trap for the International Police. She participates in the Red Chain Project's critical phase at Mount Coronet. Following the capture of Azelf, Uxie, and Mesprit with mercenary J's help, she joins Cyrus and other Commanders at headquarters. When Ash, Dawn, and Brock arrive via the Lake Trio's teleportation, she demands their elimination due to this connection. After Cyrus departs, she helps overpower and capture them along with Looker and Team Rocket, transporting the hostages to Spear Pillar. Assigned to guard the hostages during Cyrus's confrontation with Dialga and Palkia at Spear Pillar, Jupiter declares the imminent end of the universe to Cynthia and the captured group. Cynthia's Garchomp swiftly defeats her Skuntank, and she is physically restrained. Following Cyrus's plan's failure and disappearance, Jupiter is arrested by Looker alongside Mars and Saturn. She reappears in "The Arceus Chronicles," rejoining Team Galactic to retrieve Cyrus. This operation involves acquiring Arceus's Flame Plate and manipulating Heatran to power a dimensional gateway device. Jupiter battles Ash and allies to prevent interference but is defeated, leading to her capture by Cynthia and arrest by Officer Jenny alongside other Commanders, resulting in mission failure. In *Pokémon Masters EX*, Jupiter maintains her Team Galactic affiliation, initially supporting Cyrus's ambitions unquestioningly and assisting efforts to replicate Sync Stone technology. Her loyalty faces challenges during confrontations with Sinnoh Gym Leaders Brock and Erika, and particularly Champion Cynthia, prompting introspection about Cyrus's disregard for emotions and utilitarian treatment of subordinates. Despite these doubts, she joins a temporary alliance with protagonists to locate Cyrus after Professor Bellis falls into a supernatural sleep, indicating a persistent desire to reunite with her leader. Her primary Pokémon partner is Skuntank, consistently present in operations. It demonstrates agility and combat effectiveness, using Hyper Beam to clear ruins in Celestic Town and battling at Lake Valor and Spear Pillar before defeat by Cynthia's Garchomp, with Jupiter habitually praising it for success. She possesses at least one additional unseen Pokémon, prevented from deployment during her capture at Spear Pillar.