Muffler-chan is a female hamster from the Hamtaro series, recognized by her long green hair and the distinctive muffler or scarf she wears around her neck. She is a gentle and caring member of the group of hamsters known in English as the Ham-Hams. Muffler-chan's personality is defined by her kindness, devotion, and a strong sense of responsibility, particularly toward the younger and more naive hamsters in the group. Her primary motivation is the well-being of her friends, whom she looks after with patience and attentiveness. Within the story, Muffler-chan serves as a nurturing presence, often stepping in to guide or protect others from trouble. Her most notable relationship is with Chibimaru-chan, a small and playful hamster with a tendency to wander into mischief. Muffler-chan treats Chibimaru-chan like a little sister, watching over her closely to prevent her from getting lost or causing accidents. This protective dynamic is a consistent part of her role, and she approaches it with a calm and steady manner. While the series does not feature significant personal development arcs for many side characters, Muffler-chan remains a reliable and supportive figure throughout the adventures, showing a quiet consistency in her loyalty and care. Her notable abilities include a keen awareness of her surroundings and the patience to manage the energetic personalities of her fellow hamsters, making her an essential stabilizing member of the group.