Fate/Grand Order Arcade Tiamat Luminasta Alter Ego Larva is depicted in a dramatic forward-leaning pose that communicates both authority and agitation. The figure features meticulously sculpted scales and fins along the limbs and torso, with luminous wing panels extending behind her that catch light from multiple angles. A textured base is carved with arcane sigils and flame-like swirls, grounding the character and suggesting motion. The color scheme blends deep purples and emerald greens with metallic gold highlights, while translucent resin accents simulate a crackling energy core at her chest. Subtle glowing eyes complete a commanding, otherworldly presence.

Within Fate/Grand Order Arcade, Tiamat is presented as a primal force whose presence unsettles both mages and rivals. In her Alter Ego form, she blends earth-born resilience with unpredictable destructive potential, transforming battlefield terrain into a living hazard for opponents. The Larva designation signals a latent metamorphosis, implying her power can evolve during a fight as the player learns to harness her energy. Her narrative thread involves awakening long-buried protections beneath cataclysmic ruins while external factions scheme to bind her for their own ends. She remains both guardian and elemental threat, demanding respect and strategic timing from the summoner.