TV-Series
Description
Luna Yumizuki shines as a pop idol within the unit Rummy Labyrinth, partnering with Am Chouno. Her striking appearance showcases shoulder-length pink hair sculpted into a crescent moon silhouette, golden eyes with distinctively wide pupils, and stage outfits blending black-and-pink frills with crescent motifs. Off-duty, she dons casual ensembles like a maroon shirt paired with a gray skirt or a vibrant pink-and-white jacket with shorts, often accessorized with a brown wide-brimmed hat and red glasses. Later updates trim her hair shorter while preserving its lunar theme, mirroring her evolved idol wardrobe—a white dress accented with bold pink and black segments.

Driven by unwavering dedication to her craft, Luna strives to deepen her bond with Am beyond their professional synergy. Her endearing clumsiness surfaces in forgotten Vanguard matches or misplaced Harri cards, while social unease emerges during formal exchanges, notably with Chrono Shindou. Persistent efforts to connect with Am define her arc, from tenderly retrieving a discarded mitten to offering solace during moments of vulnerability, cementing their evolving loyalty.

Introduced to Vanguard as a bridge to a friend, Luna masters the game under Chrono, Shion, and Tokoha’s guidance, wielding a Pale Moon deck anchored by her signature Harri unit—a thematic nod to her moon-linked surname Yumizuki (弓月: "bow" and "moon"). Her journey expands through G Quest missions, collaborating with Naoki Ishida and Shingo Komoi in Zoo Branch Quest operations and item retrievals.

The Stride Gate crisis tests her resolve: volunteering for Satoru Enishi’s unit-summoning experiments to aid Am, Luna succumbs to a zombified state, unleashing destructive rampages that topple Mamoru Anjou and the Dragon Empire Branch. Trapped within the Stride Gate’s confines, her liberation hinges on Am’s intervention, culminating in a cathartic duel that breaks Enishi’s control. Together, they vow restitution for their manipulated actions.

Post-crisis, Luna resumes idol pursuits, co-founding the team "RUMMY LABYRINTH with Saya" alongside Am and Saya Yatomi for the Under-20 Championship, while remaining an active Vanguard ambassador. Her narrative weaves threads of sacrifice and redemption, anchored by her unyielding friendship with Am and recovery from external manipulation.