Fubuki is a key character from the anime series Mecha-Ude: Mechanical Arms, serving as the younger sister of another central character, Aki Murasame. She is a Mecha-Ude user, bonded to a parasitic mechanical arm named Amaryllis, which has a sinister, flower-like form. The bond with Amaryllis is directly tied to a serious medical condition that defines her role in the story. Fubuki suffers from an inability to produce a vital energy source known as Arbitrium, forcing her to rely on absorbing it from other Mecha-Ude users to survive.

Fubuki's background is tragic and central to the series' conflict. She and Aki are twin sisters who were involved in a catastrophic incident that resulted in the death of their parents. Following this event, Fubuki was presumed dead for years, and Aki spent the intervening time hunting the "Worm-type" Mecha-Ude she believed responsible for the tragedy. The revelation that Fubuki was alive and that the incident may have been an accident caused by her own out-of-control powers creates a deep emotional conflict for Aki, who must now choose between her long-held vengeance and the sister she thought she had lost. After the incident, Aki took Fubuki's original Mecha-Ude partner, Sinis, as her own.

Personality-wise, Fubuki is portrayed as a victim of her circumstances, and her motivations are primarily tied to her dire physical condition. While she is initially presented as a potential antagonist due to her association with Amaryllis, it becomes clear that she is being manipulated. Her Mecha-Ude, Amaryllis, is the true mastermind, a parasitic entity capable of controlling other people and inducing berserker rages. Amaryllis uses Fubuki's illness as a pretext to target the protagonist, Hikaru, claiming that his abnormally large reserves of Arbitrium are the only cure for her condition. This plea is ultimately revealed to be a manipulation, and Fubuki is effectively a puppet controlled by Amaryllis.

Her primary relationship is with her sister, Aki, and the tragic history they share. The narrative explores how Aki's quest for revenge is complicated by the sudden reappearance of her seemingly fragile sister. Another key relationship is with her own Mecha-Ude, Amaryllis, which is a parasitic and controlling presence rather than a true partner. This stands in stark contrast to other bonds in the series, such as Hikaru's partnership with his Mecha-Ude, Alma. Fubuki's development within the story is rooted in her transition from a presumed-dead figure of the past to a living, present threat, and then to a tragic victim. Her abilities are not directly showcased, as they are functionally the same as the dangerous and mind-controlling powers of her Mecha-Ude, Amaryllis. Her condition also grants her a notable degree of resilience, as she survives the loss of her original Mecha-Ude, an event that usually proves fatal for other users.