Post-first-read Gideon the Ninth questions:

To be updated as I continue read #2:

1. Who is Gideon, really?
1. Why didn't she die as a child?
2. Who is her mother?
3. How does she relate to the original Lyctor/cavalier Gideon from the note?
2. Is Gideon really dead?
1. Ditto Coronabeth.
2. And Camilla.
3. And Palamedes, to be frank.
3. What is the thing in the crypt?
1. The suggestion is that the Emperor could only be killed by the thing.  Who is he fighting in space, then?
2. Was it awoken by Gideon and Harrow?
4. Is Harrow actually a Lyctor?
1. If Gideon isn't dead, then she can't be bound to Harrow.
2. The "half a Lyctor" comment from the H9 prologue suggests this might be the case.