Hello Mimmy, also known as Mimmy, is Hello Kitty’s twin sister in the Hello Kitty franchise by Sanrio. She is usually depicted as a gentle, shy, and thoughtful character who often contrasts with Hello Kitty’s more outgoing personality. Mimmy is recognized by her yellow bow and is commonly shown as a supportive family member and friend within the series. Her role is to enrich the world of Hello Kitty by representing kindness, warmth, and sibling companionship.