Musashi commands her trio within Team Rocket alongside Kojiro and Nyarth, granting them leeway for side pursuits. Her appearance is defined by long magenta hair, often in a comet-tail curl though occasionally shortened accidentally by Pokémon like Scyther or Seviper. Large green orb earrings are her signature accessory. She wears a customized Team Rocket uniform: a black undershirt showing her midriff, a white high-collared shirt with a red "R", a white miniskirt, black thigh-high boots, and shoulder-length gloves. She exhibits a short-temper, vanity, and diabolical tendencies, prone to explosive anger and dramatic reactions especially concerning threats to her beauty or hair. Fiercely protective of her appearance, she explodes with fury at being called "old." Despite this volatility, she shows authentic care for her Pokémon partners. She favors snake-like Pokémon such as Arbok and Seviper, plus Poison-types, and harbors a strong desire to steal Dratini and Smoochum whenever encountered. A passionate, long-standing rivalry simmers with fellow Team Rocket member, Cassidy. Musashi's trio faces restricted Team Rocket privileges, including denied vacations and extra Pokémon support, stemming from their history of mission failures. Her personality shifted temporarily during a promotion to Advanced Agent in the Pokémon: Black & White series, adopting a calmer, more villainous demeanor, before reverting after Operation Tempest collapsed. She frequently employs disguises like "Jessilina" for Pokémon Contests or "Jessilie" for Showcases, each with unique outfits. In *Jirachi Wish Maker*, Musashi joined a scheme to capture Pikachu during Butler's magic show. Disguised as a clown with Kojiro and Nyarth, she distributed flyers. During the performance, the trio revealed themselves, seized Pikachu in an electricity-proof container, and declared their intent to make all Pokémon vanish. Butler's Dusclops intervened, attacking them. Defeated by Pikachu's Thunderbolt and expelled from the tent by Night Shade, the audience mistook their appearance and defeat for part of the magic act. Her partnership with Kojiro is close, though he often masks his true feelings about her perspectives. Their dynamic includes relentlessly pursuing Satoshi and Pikachu across regions via their signature balloon, perpetually hatching new capture plans. Nyarth frequently aids by translating Pokémon speech.