Kubinashi from Nurarihyon no Mago
As his name would imply, his head floats above his shoulders and he has no neck. He is one of Rikuo’s yōkai guardians and frequently takes care of laundry around the Nura mansion. He fights using thread/string that entangles the target the more it struggles, which can become as strong as chains by imbuing it with his “Fear”. When he was alive, he and a friend were toyed with and killed by yōkai. As a result, he became a yōkai himself in order to exact revenge. After Rikuo becomes head of the Nura Clan, Kubinashi is promoted into the elite class of the family and becomes one of Rikuo’s territorial commanders.
Prior to meeting (and being defeated by) Rihan Nura, he was well known as “The String Assassin of Hitachi Province” and went around killing yokai. Though Rihan originally intended to kill him, Kubinashi was protected by Kejoro and ended up joining Rihan’s Hyakki Yakō.
In Kyoto, after the Nura Clan’s forces are devastated by Tsuchigumo, Kubinashi goes back to his old murderous ways and becomes determined to single-handed take down the Kyoto Yokai and ultimately Hagoromo Gitsune herself. He is confronted by Ibaraki Doji at the 6th seal of Ryuenji and is nearly killed trying to fight alone. Kejoro literally knocks sense into him and they battle Ibaraki Doji together with slightly more success. Ultimately, however, they are rescued by Kappa and Yura when things take a turn for the worse.