Colonel Monochrome

This black-and-white stray cat, wandering freely through Ueno Park, earned the title 'Colonel Monochrome' from the three girls of COLORS, who noticed his panda-like markings and crowned him their supreme leader. While he generally carries himself with a calm and friendly demeanor, he maintains a peculiar and unexplained wariness toward the member Saki. Despite being a cat, he actively participates in the group's various missions and has even demonstrated the remarkable ability to operate a camera on his own—making him a deeply trusted yet endlessly mysterious companion.