Hatsune Miku is depicted in a dynamic siren-inspired pose, balancing elegance and motion. Her signature turquoise hair flows upward and behind her, styled into long twin tails with translucent tips that catch light from the base. The figure features a sleek bodice with aquatic motifs, a layered tail skirt and fin-like elements, and subtle sea-tinged accents along the edges. The overall silhouette emphasizes movement, with one leg extended and one arm reaching forward as if guiding a melody through the air. The paintwork uses glossy and pearlescent finishes to emulate scales and water reflections, while the base provides a simple oceanic pedestal that complements the character without overpowering the design. This rendition captures the Project Diva aesthetic with a marine twist.

In the imagined universe of Hatsune Miku -Project Diva X, Miku ventures beyond the concert hall into an offshore stage where sound waves become visible and bend like light. As Siren, she channels a timeless melody that calls sea creatures and tides to form a living chorus. Her performance is a fusion of digital rhythm and natural currents, weaving a story of courage, friendship, and the power of music to bridge worlds. The character interacts with other Project Diva figures as part of a larger arc about restoring harmony to a fractured ocean stage, using her voice to calm tempests and unite fans across virtual seas.