So the new RPG scenario, Winter's Blade, just confirmed a new Kolat Member.
Please note that the below information is a spoiler for that scenario.
The scenario book confirms that Miya Satoshi (the Miya Daimyo) is a high ranking member of the Kolat.
I don't have the book on me at the moment but I believe the Kolat code name he was given is Green Chrysanthemum.
I'll confirm that Kolat code name once I get home.
On a side note, the Courts Of Stone book tells us that Kakita Yoshi became a courtier due to being born while the Kyuden Kakita was under siege and had it's gates closed.
The reasoning fopr this is that Kyuden Kakita is subject to a curse.
The wording states that any Kakita born, while the gates are closed, becomes cursed to never touch a blade.
Should a Kakita, that is born with this curse, touch a blade the curse will apparently cause severe harm to the Kakita family.
Thus Kakita Yoshi swore off ever touching a blade and became a courtier.
Just some fun new info I thought I would share.