|Japanese name:||椎名 真冬|
She's addicted to video games, and spends much of her free time playing with a handheld game console that resembles a pink PlayStation Portable. Despite her shy personality (or based on Ken's logic, because she's shy) she confesses her love to Ken, although she says she just wanted to share her feelings with him rather than start a relationship, because she loves the Student Council's atmosphere most of all, implying that even when she loves him she doesn't want to change how things are at the moment. Mafuyu and Ken met in the winter chatting online with him as Yuki (with Ken as Key) and even having a more spirited personality online. Ken fell asleep once in the snow and, despite her fear of men, took him out of the freezing cold. Their meeting showed him a clear understanding about what strength really is. Like the season she represents, she's extremely passive and keeps a lot to herself, but she will show her real self and her real feelings if she feels comfortable.
Voiced by: Yuki Horinaka