I like Dr. Rekhyt, gotta say.
As for Ramuthra, his true form should be visible on the 7th plane, as with all of the other spirits.
Assuming he has one.
I think that it's possible that the hulking form we see IS is real form.
He has no form on the first three planes (the ones magicians can see), and there's no evidence to support that he has one, period.
If he does, it'll be on the 7th, and probably exactly the same as what we see through the plane-wake he leaves, just instead of a crystal-clear body, a opaque (or translucent) body.
Must have interesting eyes.
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