Shinobu Oshino is a fictional character mistakenly associated with the series 'Neon Genesis Evangelion'; however, she actually belongs to the 'Monogatari' series. She is a mysterious, enigmatic vampire who plays a significant role throughout the narrative. Initially introduced as a young girl with an intimidating aura, her character is deeply intertwined with the supernatural events that unfold. Shinobu's complex relationship with the protagonist, Koyomi Araragi, is central to the series, as they navigate the challenges posed by various apparitions. Her character development provides insight into themes of identity and existence.