Biscuit-tan is depicted as a plucky, chibi-style figure that radiates warm whimsy. The character wears a soft, biscuit-brown outfit accented with cream-colored frills and a tiny bow. Her hair is sculpted in rounded layers, with subtle grooves that catch light to mimic a glossy glaze. Large, sparkling eyes give her a curious, friendly expression, while a tiny mouth and blushed cheeks add charm. She stands on a decorative base that resembles a biscuit crumb pattern, with gentle shading to highlight contours. The paint finish is smooth, with careful edge lines and delicate highlights along the limbs, hairstyle, and accessories to convey a handmade, collectible feel.

Biscuit-tan is a cheerful resident of the 2Channel universe, a tiny explorer who collects post cards, dialogue fragments, and tiny rumors from the end of each conversation thread. In world-building lore, she travels between digital cafes and cozy corners of the network, sharing crumbs of wisdom with friends and encouraging players to imagine stories beyond the screen. Her personality blends mischief with kindness, often breaking into a giggle when a chat turns into a playful debate. Fans follow her adventures as she helps characters solve small mysteries and keeps the spirit of curiosity alive.