Chum Izumi is a fictional character from the multimedia project and anime series 'Sanrio Danshi' (Sanrio Boys). Chum is the Sanrio character that is loved by the human character Yuu Mizuno, representing the Sanrio squirrel mascot. Chum is cute, energetic, and supportive, often serving as a comforting presence for Yuu. In the series, Chum symbolizes the importance of cherishing one's interests and friendships, encouraging the boys to embrace their love for Sanrio characters without feeling embarrassed.