Kohaku is a young woman who is a descendant of modern humans. She is Ruri's younger sister and the daughter of Kokuyo. She is one of the protagonists of the series. After meeting Senku and witnessing his bravery, courage and talent, Kohaku invites him to her village. Since Senku assists and fascinates the village with many of his scientific inventions and turned out to be the savior the village ancestors talk about in the stories that are passed down, the population is ultimately rallied to fight and stop Tsukasa's tyrannic empire. Add this officially licensed Kohaku plush to your collection!