Mem-Mem functions as the Energy Fairy of Noodles in CooKingdom, serving as Ran's dedicated partner. His full name, Membernu Churuchurutto Kurukururin Glutamine Memdragon, is typically shortened to Mem-Mem. He punctuates sentences with "~men," linguistically nodding to noodles.

In default form, he appears as a yellow-skinned dragon with orange horns, wearing a dark orange collar adorned with a white frill and a heart-shaped jewel. At Dreamia park, he temporarily adopts a humanoid adolescent form featuring draconic horns, tail, and ears. This form dons light yellow attire: orange shorts, red suspenders, green footwear, and optionally, a specialized Children's Lunch Dress outfit with gold spoon-and-fork earrings, a fish-cake-patterned apron, dragon wings, and an oversized jewel on an orange ribbon.

Personality-wise, Mem-Mem remains calmer and more rational than fellow Energy Fairies. He consistently supports Ran, especially cherishing her culinary passion, and acts as an elder sibling figure to Kome-Kome, comforting her during distress. This supportive role extends through group investigations and antagonist confrontations.

Key developments unfold at Dreamia: he joins noodle-themed attractions with Ran, helps Kome-Kome embrace children’s meals, and defends allies against rogue park robots. His abilities include expelling fire offensively and performing noodle-based divination to locate Recipepes—though the latter exhausts his energy. Backstory reveals a prior connection to Oishiina Town via an erased-memory incident involving other Energy Fairies twenty years earlier.

Post-narrative, Mem-Mem relocates to CooKingdom to guard the Recipe-Bon, maintaining occasional contact with human associates. His birthdate, November 11, aligns thematically with Noodle Day.