Black Burn is the original Thunder King and a Gravity Child whose Regalia uses artificial lightning as a destructive force as well as a wire system similar to Nue's. Apparently he has a son (his son is later revealed to be Nue in Chapter 271), as briefly mentioned by his copy during Sleeping Forest/Inorganic Net vs. Kogarasumaru fight in Chapter 223. He was recently revealed to be "Hanged Man".