Ryokaku no Oni



Ryokaku no Oni, the "Demon of Marriage", was an oni who kidnapped samurai of pure body to marry with them.

Appearance and Abilities
In normal form the demon was an armored warrior with two mouths. It could turn itself and a single victim into black fog, surround its chosen with its own ghostly shape. Victim and oni flied off at the speed of the wind returning to its lair.

Wedding
The oni dropped an article of the victim's clothing into a cauldron of boiling blood, divining if the victim was of pure body and honorable ancestry, suitable to become its spouse. During the ceremony, Ryokaku was usually surrounded by troll guards which forced the victim to be fashioned in wedding clothes.

Weakness
If challenged to an iaijutsu duel, the oni was magically bound to duel fairly, so it was known that abductees were rescued and saved from marrying the demon.