OS-tan - 3.1-tan is designed as a compact desktop statue that merges tech-inspired motifs with chibi character charm. The figure stands in a dynamic idle pose, with one hip cocked and a robotic arm slightly raised as if ready to greet the OS prompt. The outfit blends white and electric blue panels with subtle translucent accents that evoke screen glow, while small, engraved circuit lines run along the limbs. Her hair is styled in layered strands that resemble cables, tucked with metallic pins, and her base resembles a tiny motherboard plate with faux ports.

3.1-tan is depicted as the cheerful mascot of the OS-tan line who thrives on compatibility and playful experimentation. In-universe lore, she represents the release notes and kernel updates that quietly power every user’s daily life, guiding beginners and veterans alike through a friendly, often humorous interface. Her story emphasizes curiosity: she taps her fingertips against a translucent display, drawing new features into existence with confident, almost childlike wonder. Though small in stature, she carries a toolkit of metaphorical patches and a spare power cell, reminding collectors that maintenance and care keep technology vibrant and alive.