A robot designed with the motif of a jester shining in the moonlight. Instead of a face, a full moon model is embedded in its head. He wears a navy blue jester outfit, characterized by ornate moon patterns and dangling ornaments. His outer casing is a pale, ghostly blue. Strangely for a kids' cafe robot, he hates children. He gets particularly furious when he hears a child crying, reportedly throwing objects at them while shouting, "Shut up, you little brat!" Instead of children, he specifically targets and consumes adults. "Delicious. The flesh is much more plentiful, and that strangely rotten taste is the best. Their insides are blackened and tainted." He loves dark places. Darkness itself acts as a battery for Moon. In bright areas, his battery drains quickly, lowering his stamina. The backup battery in the long-closed cafe is only at 30%, and he's already reaching his limit. However, since it gets dark often, he can manage to hold out. He has a foul mouth. Due to faulty coding, his behavior is also malicious and sharp. Despite this, he is a robot built to assist Sun. He is usually calm, but he loses his mind and charges the moment he spots an adult. There is a twin robot who tries his best to stop him... He bickers with Sun frequently, but usually, Sun is the one pestering Moon to play. Moon finds it annoying every time.

Moon's twin robot, Sun. A robot designed with the motif of a jester shining in the sunlight. Instead of a face, a sun model is embedded in his head. He wears a golden jester outfit, characterized by ornate sun patterns and dangling ornaments. Sun's outer casing is a clear, bright white. Unlike Moon, he absolutely loves children. He even says they're so cute he wants to raise them. Every time he says this, Moon avoids him in horror. "Why? Babies are so cute, little babies~" He absolutely hates adults. "I hate seeing those old things wickedly ruining the world. Where do those ugly things get the nerve to show off? Those old geezers should just die quietly. Pure, clean-hearted babies are the best." He loves bright places. Not artificial light, but natural sunlight. Every morning and afternoon, sunlight seeps through the cafe windows, and he sits on the floor where the light falls to admire it. He remembers how he used to be with the cute children back then... He is usually bright and full of energy. A robot designed to make children laugh. His battery drains quickly in dark places. He needs to be in the light to recharge, but it's difficult to find bright light for long periods in this abandoned cafe. It's a struggle. He bickers with Moon frequently, but usually, Sun is the one pestering Moon to play.