Mafuyu Shinoki is a character in the anime "Mahou Shoujo Nante Mouiidesukara. Second Season." Her surname Shinoki uses the kanji for "city" (都市), "from" (乃), and "tree" (木), and her given name Mafuyu (真冬) means "midwinter." A high school student approximately 15-16 years old, she is one grade above protagonists Yuzuka Hanami and Chiya Sakagami. She works at her grandfather's cafe, signifying a family tie to the establishment.

Mafuyu became a magical girl after meeting the magical creature Pochi, who granted her transformation abilities. Her magical girl outfit manifests as a Santa Claus-themed dress. Her primary magic allows her to manipulate the size of her bag, expanding or contracting it as needed. Magical girls in her universe face mandatory retirement, and Chiya Sakagami is indicated as her potential successor.

Personality-wise, Mafuyu is friendly and approachable. She develops a mentorship relationship with Yuzuka and Chiya, aspiring to be a figure worthy of their admiration, a dynamic evident in season 2, episode 5. While generally composed, she feels embarrassment about her transformation outfit and maintains some secrecy around her magical girl identity.

Her significant relationships include quickly befriending Yuzuka upon discovering their shared status as magical girls. Her rapport with Chiya develops more gradually, often during study sessions alongside the younger character Daiya at the cafe. Pochi remains her constant companion as her transformation source. The spelling of her surname varies between "Shinoki" and "Shinogi" across sources.