Matsuri Shirogane is the main protagonist of the anime series Ayakashi Triangle. As an exorcist ninja, Matsuri is tasked with protecting his childhood friend Suzu Kanade from ayakashi, supernatural creatures that feed on her spiritual energy. Matsuri's life takes an unexpected turn when he is cursed by a powerful ayakashi, transforming him into a girl. This transformation adds complexity to his mission and relationship with Suzu. Throughout the series, Matsuri navigates the challenges of his new identity while continuing to battle ayakashi, highlighting themes of friendship and identity.