I don't believe you are a succubus, many people have a natural ability to attract and charm.
But as for the one who says human beings cannot have the souls of past daemons or angels, this is untrue. Many beliefs and myths contradict that, as some men were in fact considered gods incarnate. In Buddhist belief of reincarnation, there is a system of "steps" every soul takes and although they should progress forward, some do retrogress, and deva, animal, and hell-beast are part of those stages. But the soul itself of every single one is the SAME, it is the transition, the wisdom, and the form they are in at the time that makes them different. It is their advancement or decline in achieving enlightenment. Which means, yes, you are human because you are human right now. What was in your past is past, but learned from (hopefully). What is in you future depends on what you do presently and how you live your life.
So the idea of "otherkin" in my opinion, are people who recall what they were before this life, but it does not mean that they will or should desire to return to it in the next. We are supposed to be progressing, not clinging to our past. We learn from our past and should be desiring to attain something greater in our future through bettering ourselves and becoming attuned/one with the Universe.