I must say it's an intriguing concept.
Of course, I'd argue that Prince Siegward, unless he's from a culture which is into the concept of dis-embodied beings running around who can be selective concerning who can 'hear' them, should be wondering if he's going mad...and then become majorly concerned when the voices in his head turn out to make sense...
No, I haven't read the scanlations or fan translations or MTL'd any of it myself, so the above is purely my perspective based upon the description.
It could be fun.
