This papercraft is Natto Kozou, a yōkai of the Nura Clan who played with Rikuo when the latter was a child, based on the manga series Nura: Rise of the Yokai Clan (known in Japan as Nurarihyon no Mago), also appears in same named anime and video game, the paper model created by gankutsu-o-taku. Natto Kozou's head is composed of nattō, and he smells of it as well. He frequently accompanies Nurarihyon to various places, such as shopping and visiting Inugamigyōbu Danuki.
Four hundred years ago, Natto Kozou was part of Nurarihyon's Hyakki Yakō and took part in the battle against Hagoromo Gitsune's forces. While Rikuo was growing up, he and Tōfu Kozō frequently helped set up and execute the former's pranks against other members of the Nura household. He was also among the yōkai who accompanied Rikuo during the Gagoze incident.
Nura: Rise of the Yokai Clan is a manga series written and illustrated by Hiroshi Shiibashi. Rikuo Nura is part human and part yōkai. He has a human form in the day but transforms into his yōkai form at night. He lives in a house full of yōkai along with his yōkai grandfather. Trying to escape his fate, he does good deeds in order to avoid becoming a yōkai, despite his grandfather's wish that Rikuo succeed him as the Third Head of the Nura Clan. Rikuo is different because he helps humans. He eventually comes to terms with his yōkai blood and decides to take up the position of the Third Head of the Nura Clan. Multiple factions aim to stop him or usurp his position, and he must gather friends and allies, a new Hyakki Yakō under his banner of "Fear".
You can download this papercraft model here: Nura: Rise of the Yokai Clan - Natto Kozou Free Papercraft Download [Yadi.sk] [Box] [Gavitex] [Ge.tt]