Standing approximately 180 mm tall in 1/8 scale, Wonda-chan is rendered in a bright, glossy finish that catches the light from every angle. The mascot's design embraces soft, rounded features and an oversized head, giving a warm, approachable silhouette. In this swimsuit variant, she wears a playful one-piece with a crisp, clean line and simplified seam details that emphasize her mascot charm. A tiny bow decorates the front and a stylized motif runs along the side, echoed in the sculpted waves around the base. The pose conveys movement and cheer, with one leg slightly bent and arms positioned as if inviting fans to join the fun. Subtle shading highlights the curves, enhancing the tactile feel of the fabric and the figure's overall friendly appeal.

Within the Mascot Character series, Wonda-chan is the cheerful guide who ushers visitors through each exhibition hall. In the Wonder Showcase edition, she arrives as the seaside party host, sporting a swimsuit for a summer celebration. In her backstory, Wonda-chan collects small trinkets from fans and translates their smiles into tiny 'sparkle tokens' that power lanterns lighting the venue. When the show faces a temporary blackout, she rallies her friends—other mascots with different talents—to solve a puzzle built from footprints, shells, and wave runes. By aligning tokens and reciting a cheerful chant, the lights return, and guests cheer. Wonda-chan's journey emphasizes friendship, curiosity, and the magic that happens when fans and characters connect.