Chai-nyan is a 14-year-old girl who journeyed from China to Japan dedicated to spreading the tradition of ramen. She operates her own ramen shop, enforcing a strict policy forbidding alcohol sales and consumption. This rule sparks conflict when an intoxicated character named Yoiyoi objects and attacks the shop using robots. Chai-nyan possesses distinct cat-like features, embodying the "Chinese catgirl" trope. Her design and role incorporate early 2000s anime aesthetics, blending cultural and fantastical elements. When faced with the robotic assault on her business, she stands firm, defending both her establishment and its principles. The character's story is contained within a standalone five-minute OVA, which does not extend her development, background, or backstory beyond these events.