Yukinobu Gyuki is a fictional character from the anime series 'Yuki Yuna wa Yuusha de Aru.' Known commonly as Gyuki, he serves as a guide and mentor to the Hero Club members. Gyuki is depicted as a wise and enigmatic creature who possesses deep knowledge about the Vertex and the duties of the heroes. Despite his mysterious appearance, Gyuki is a trusted ally, providing essential support and information to help the girls navigate their challenges as they fulfill their roles as heroes tasked with protecting the world.