Ichimatsu Matsuno is one of the sextuplets in the anime series Osomatsu-san. Known for his gloomy and apathetic demeanor, he often stands out from his brothers, showing a preference for solitude and a love for cats, particularly his cat named Esper Nyanko. Despite his seemingly indifferent attitude, he harbors a deep connection with his siblings and occasionally reveals a kinder and more caring side. Ichimatsu's role in the series often includes comedic and dark humor, which contrasts with his melancholic personality, adding depth to his character.