Neptune, alias Purple Heart, is the Console Patron Unit of Planeptune, embodying a fictional Sega console based on the unreleased Sega Neptune. Charged with safeguarding Gamindustri—a world molded by the video game industry—her power stems from the faith of followers, termed Shares. Transforming into Purple Heart amplifies her physical and combat prowess, replacing her playful, carefree human persona with a composed, strategic demeanor. In human form, Neptune sports short lilac hair, purple eyes, and casual attire adorned with controller-themed accessories. As Purple Heart, her appearance shifts dramatically: long purple twin-tails, piercing blue eyes, and a streamlined black-and-purple combat suit with tactical armor. Mid-battle, she morphs into aircraft like fighter jets or stealth bombers, underscoring her adaptability. Her personality balances irreverent humor, fourth-wall-breaking quips, and a rivalry with fellow goddess Noire, juxtaposed against loyalty to her sister Nepgear and a fierce dedication to justice when challenged. Her narrative traverses dimensions and timelines. Early arcs depict her exiled to the mortal world as an amnesiac, slowly reclaiming her divine influence. Subsequent plots see her captured or sidelined, relying on allies like Nepgear for rescue—emphasizing teamwork despite her protagonist status. Spin-offs reimagine her leading idol groups, starring in zombie films, or navigating school life, maintaining her core traits in varied settings. Relationships define her growth. She shares an unshakable bond with Nepgear, her younger sister and fellow CPU Candidate, often shielding her from danger. Dynamics with goddesses Blanc, Vert, and Noire blend camaraderie with competitive tension, mirroring their dual roles as allies and rivals. Support from companions like IF and Compa offsets her tendency to embroil others in chaos, highlighting her chaotic yet magnetic charm. Combat abilities include swords in human form and massive broadswords in HDD mode, paired with EXE attacks such as Neptune Break and Dimensional Slice. Her fighting style merges physical strikes with energy projectiles, peppered with gaming jargon and pop-culture nods. Quirks like a phobia of eggplants, a love for retro games, and an obsession with pudding add distinct flavor. Beyond games, drama CDs and anime adaptations delve into slice-of-life escapades—gaming mishaps with a spouse, comedic attempts to lull others to sleep—blending her exuberance with fleeting vulnerability. These portrayals enrich her as a multifaceted figure, balancing levity with introspection. Evolution across the franchise mirrors shifting tones: earlier iterations frame her as proactive and earnest, while later entries spotlight her comedic meta-commentary on gaming culture. Yet her essence as a charismatic, justice-driven heroine remains constant, anchoring her as a linchpin of the series’ multiverse.