Definitely interesting, though at least so far the framing seems excessive - the story is interesting enough on it's own and adding another layer on top with all the stage play stuff seems unnecessary (though I do quite like theater) - I am fully ready to eat my words if later on this results in some fun twists.
One big thought going through my mind after the prologue, is that bit where Dice seems to imply that Calm isn't actually calmness but some other personality fragment. Then the question is, what actually IS Calm?