He is one of the "Touched"... it is a term I use for those of us who appear mentally unstable to others when in reality it is more like a contest of spirits, of minds. At least, I assume so and I do apologize if I am incorrect. When I met Symarille, he had been of sound - singular - mind.
If his ailment is like mine, and most are not, you can only hear both of him in the dream realm because the dream realm we speak in is of the mind, the subconsious. In the waking world, it is more like one moment he is Sym and the next moment you could be speaking to this alter ego without a blink of an eye.
Quite dangerous when not properly controlled.
Oh yes, you know all about control. Don't you. <The voice is not the usual monotone of Wildescent, it is in fact more sultry and mocking.>
<Sighs, shakes her head and continues in her normal flat tone.>
Sometimes there is no cure beyond one of two things. Complete control of the Other, or a way to combine the two into one.
I am still researching my version of "Touched", but have been tutored by my liege and some very knowledgeable others in control while waking... for the most part.
I have researched others from the past like this and it seems that while many reasons cause it to originate, extreme duress/stress and heavy emotions can cause the Other to strengthen.
May Symerille find strength and stave off his Other long enough to find solace.
Dame Lady Knight Wildescent Nightwolf ~ Arrandin, White Rose Keep
AKA - Lady Death