A legend of Praxus in Cybertron says that one soul, no matter if they're male or female, the soul will possess a Yokai of demonic power, which likes to eat and can talk. It can also interact with it's host's hair, And that soul will have to stay with the Yokai for the rest of their life. The Yokai is a true demonic mop of power, it can look a bit scary, but it's personality may be the opposite, or copy the host's personality too. This legend is of the Futakuchi-onna..