Presented in a dynamic, mid-action pose, the Amanchu! Ooki Futaba figure captures the buoyant spirit of the series. The character stands poised on a textured rocky base that evokes the seaside setting, with subtle sand tones and wave specks. The sculpt highlights Ooki Futaba's signature outfit rendered in crisp, marine-inspired colors, including a detailed sailor-style top, pleated skirt, and optional diving gear accessory. The hair is sculpted with soft, flowing strands that frame her determined expression, while tiny details on the cuffs and shoes add realism. The figure uses a mix of PVC and ABS to achieve clean lines and sturdy joints, and the paintwork features subtle shading to emphasize contours and fabric folds. The overall composition balances elegance and energy, inviting collectors to imagine a moment of discovery by the water.

Ooki Futaba is introduced as a curious and warm-hearted girl who discovers a new world when she joins the diving club and spends summers by the sea. Her story centers on friendship, personal growth, and the gentle humor of seaside life, as she learns to trust her instincts, overcome hesitation, and share small triumphs with her companions. Throughout the series she grows from a cautious observer into an active participant in adventures beneath the waves, all while maintaining her kindness and a hopeful outlook that draws others toward her. This figure embodies that transformative spirit, translating it into a tangible tribute for fans.