A michievious oni (Amanojaku) child who loves pranks and hides himself in Kyoto.
He is, by nature, contradictory. He'll often say the opposite of what he is thinking and play pranks on anyone he can find. In fact after tagging the Yellow Dragon Spire and causing a city wide blackout he was chased out of town.
He hides his true personality behind his pranks but he is, at heart, a good character. For example, despite being an Amanojaku he is an awful liar and will often inadvertently show his caring side (and then panic when he does).
His origins are a mystery. He has no memory of his parents or his own name - and had no friends to give him one. He acted like he didn't care, but he was happy to have one given to him by Izuna.
He chooses his clothes based on what he saw and liked on the citizens of Kyoto, so he just wears what he likes the look of without thinking too hard about if the clothes are for boys or girls.
The reason his mace suddenly becomes light and easy to swing is a secret known only to him.