sword sheath's child. bira is a little boy who loves fishing, he also lives and wanders with his dwarf grandfather in the wilderness. one day his grandfather told bira to wait for him in the northern part of the forest, but his grandfather disappears. until many years later, bira's been waiting for him while living in the forest, befriending a family of bears, and staying away from humans; just like what his grandfather had warned him to do. he meets and saves tanyu's life by chance, and later befriends him. bira, having heard his friend go on a risky quest, leaves the forest and go to the outside world to save his tanyu.