I was thinking about how we don’t actually know how Pyrrha died. Just that by her own telling, she “was killed,” and that she was the first cavalier to die outside Cristabel and Alfred’s suicide pact.
Before Nona came out, I suspected Gideon the First must have killed her, probably with her consent. That seems unlikely to me now, with everything we’ve learned about them in Nona.
Also before Nona came out, I came to the conclusion that the lyctors demanded John kill Alecto following a “great attack” on Canaan House and the revelation of what a Resurrection Beast is. Based on Mercymorn’s assumption that Alecto was a freak who would attack her on sight, I also highly suspected that Alecto either participated in or perpetrated the attack on Canaan House, thus proving herself beyond a shadow of a doubt to be untamed and dangerous in a way that not even John could talk his way out of.
I just recently noticed a detail in Nona the Ninth that might slot all this together like puzzle pieces:
ALT
Pyrrha has seen something very like Nona’s tantrums before, and that memory scares her. Enough that she avoids even thinking about it.
ALT