Gemini Demons.
A Gemini demon is a species of demon who can not only change their personality but gender depending on their victim. This species of demon has the same task as a Succubus or Incubus demon. To collect the matter or energy of sleeping men. Though Gemini demons can also target women. By changing their gender to their victims preferred attractive gender they can entice their victims more. This makes it easier for them to take their victims energy or life force. Their personality change will be similar to that of the zodiac Gemini. They have fluent mood swings, meaning at one point they could be sweet and innocent and kind to make you trust them and the next day can be seductive and sexualizing to entice you.this makes their victims unsuspecting unless they know information on the Gemini demon. Gemini demons are known to be very beautiful and sexual these demons are highly native to Japan's less popular and less populated regions this makes it to where their victims are not noticed as easily to be missing.Sometimes Gemini demons do tend to take their victims sometimes it just slowly drain their life force. This is the sign of their dual personality change.