Tarusaru

Once a resident of the village submerged by the dam, this spirit from Futaba remains tethered to the sunken lands. After Natsume honors his memory by returning his true name, the ghost offers a profound gesture of gratitude by allowing the boy to peer into his magical mirror. This pivotal moment provides the clarity needed to reveal that Tsubame had been secretly inhabiting his body, uncovering a hidden truth through the spirit's selfless aid.