Futanki was initially a member of the group, but gradually he had many strange actions and words, typically when the group was watching the watchtower in case the monster Wendigo appeared, he idly said he didn't know what human meat tasted like, making the group suspicious. He always appears and is quite mysterious, sometimes suddenly appearing behind the members, startling them. It seems like he has some connection to that monster Wendigo, or he's a Wendigo disguised.