Something else that would have trickled to a stingy bug's ears --
Rayu's sensei was (is?)
Kakita Mitohime.
Now this is an interesting pile to untangle! Mitohime was a figure of scorn because of her mother's actions and her own heritage
(psssst Tsuka her dad was a bug), so -- given she basically was only even named to students at the Tsuma Dojo when she flubbed in her practice -- what did it say about Rayu that she was his teacher?
And what does it say now that she's, after a stint in the Colonies, first become yojimbo to the Kakita daimyo and then an Emerald Magistrate? Not so much a scorned individual now ...
Does this all have anything to do with a third-son birb from a family that looks to have more than a few secrets landing an assignment to Danjuro's court? Just why
is Rayu there?