I think/hope the answer to my question is 'yes', but I can't find any threads on it here, nor any examples of it elsewhere in the Dramaticasphere to back me up or shoot me down.
Here goes : Can I delay introducing my IC so that she only arrives at the start of Act 2, without breaking my story?
Some more info.
The IC is unknown to the other characters at the start.
The MC is a Mind Domain, Be-er, with Start and Change dynamics.
Therefore, my original concept was that the IC player would be referred to as 'missing', or that someone in her role is 'needed', so we feel the loss of her influence in Act 1 as the MC is frozen in an internal state and unable to act or begin to change.
I 'think' I can handle the IC and the RS throughlines in that first act by referring to their absence/loss instead of them actually being there (it works well with my themes and content, in fact), BUT the question is as above. Does this form break my story form, regardless of how well I write the prose?
I know I could handle this by having a hand-off of IC in the Act1/2 break, but instinctively I want to hold off from that to explore if I can do it the first way.