Mujika is an elderly mushishi who appears in the Mushishi episode titled The Sleeping Mountain. He is a solitary figure who resides in the mountain and has a unique connection with a powerful mushi known as the Master of the Mountain, for which he acts as a messenger. This connection allows him to serve as a bridge between the entity and the human world, and he is even able to secretly act as the creature itself due to the bond they share. His background as an experienced mushishi suggests a deep understanding of mushi and their behaviors, and his decision to live in isolation in the mountain indicates a willing dedication to his role as a caretaker or intermediary for that particular being. Mujika is described as being old and bald, with black eyes, and his appearance reflects his age and the harshness of his solitary life in the wilderness. In terms of personality, he demonstrates a quiet, reserved, and dutiful nature, focused entirely on his purpose of serving the Master of the Mountain. His motivations stem from this commitment, placing the well-being of the mushi and the mountain above his own comfort. Within the story, his role is that of a guide and liaison for Ginko when he investigates the strange phenomena occurring on the mountain. His relationship with the Master of the Mountain is the defining relationship of his life, one that has shaped his entire existence. He also interacts with Ginko and the villagers, though his primary allegiance remains to the mountain entity. There is no significant character development across the series, as he appears only in a single episode, but his established situation reflects a life already fully shaped by his unique circumstances. His notable ability is his capacity to communicate with the Master of the Mountain and to serve as its physical vessel or voice, a rare skill that sets him apart from other mushishi. This ability positions him as a crucial figure in maintaining the natural order of the mountain.