2k-kun, like most OS-kuns, is a rarely seen character. His appearance and mannerisms are consistent to that of his sister, 2k-tan's. He is standardly drawn wearing business attire and fashionable reading glasses. In following with 2k-tan's appearance 2k-kun also is drawn with metallic cat ears, though they are often smaller than 2k-tan's. 2k-kun is rarely found without a cell-phone or similar communicative device.