>>49963306
I'm glad for that. The Secret/Enigmatic History Society is the inferred Touhou Lore operating at it's best. If you take Aya and Keine's perspectives as fact here, they seem like a dangerous group of humans who are looking to rock the boat and studying history in the "wrong" way, but Aya's a Tengu who lies as easily as she breaths and Keine is very set in her ways that history which isn't recorded shouldn't be sought out. However, I believe they're just a group of people earnestly studying history because it's fun and the human spirit/instinct is to explore the unknown. You could say they're never brought up again because they all died, but it might just be that they didn't really care about current events and chose to focus on their mission instead.
In any case, When you're stuck in an oppressive situation and fighting is impossible, the only option left to you is to flourish. As Aya mentioned, Youkai are mainly spectating, probably because the events of the mainline games are more apparent, which leaves Mr. A a nice level of freedom to do his research with his squad.