Rikuo Nura is the main protagonist of the anime and manga series 'Nurarihyon no Mago', also known as 'Nura: Rise of the Yokai Clan'. He is a unique character, being three-quarters human and one-quarter yokai, which gives him the ability to transform between his human and yokai form. Rikuo is the heir to the Nura Clan, a powerful group of yokai, and he struggles with accepting his role as the leader and protector of both humans and yokai. Throughout the series, he grows into his responsibilities, learns to embrace his yokai heritage, and strives to unite the two worlds.