So a quick OOC addendum to Jinn's post, mostly for Union's benefit if it comes up or Union gets bored whilst Jinn sleeps or whatever. Jin accutally changes all the time whilst she sleeps...during these fluid movements that arcane energy sometimes dribbles out and over (typed according to the form of course).
FASCINATING! In the beginning, I can see Union encouraging Jinn to sleep in simply so he could observe this more. With his high intelligence and his many, many minds, I assume he would have close to an eidetic memory and he would be mentally cataloguing the order of her changes each night to try and discover a pattern. The amusing thing is that someone observing that much and asking her about her dreams could probably make the connection...but Union, never experiencing dreams, would rarely, if ever, think to ask about them.
And yes, it can safely be assumed he has asked Jinn about these things. At length.