The soulmate selection is an opportunity for those who want serious relationships in university to bond for life, your unable to break this bond, Cheat or end the relationship otherwise it may kill one of the bonded mates. Incubi have black, white or blue markings on their body while succubi have pink, purple or red. But there has be rumours that if a succubi or incubi breed they could make a Cambion, but the chances are one in a million, the cambion is different with Gold and white markings.