Thanks to Sashiko for the V8 chapters.
What Saegusa is really aiming for is a break in the relationship he sees between the powerful top secret 101st and the Yotsuba. Public exposure will cause all sorts of problems neither group wants to deal with.
What Kudo wants is no more ridiculously powerful magicians joining the Yotsuba's ranks. Both Miyuki and Tatsuya are more powerful than most magicans and are still growing. Once they officially join their clan(Tatsuya may have to leave the military), who is already known to have the strongest mages, this small secretive family would then officially be more powerful than most nations.
What I find really amusing about Koich's and Kudo's wishes to weaken the Yotsuba, is the fact that had they done nothing
, the Shiba's may have separated from their clan on their own and alleviated their worries. However, it may be their actions(as well as their inaction) that will make the author's V8 prediction of there being 'no future conflict between Tatsuya and the Yotsuba' come true.Theory:
This indirect attack on their family's power could bring Tatsuya to depend more on his clan's intelligence gathering & political influence and become more in their debt. Ruducing the possibity of him being able to break away from them.
This arc's story could still have even more hands moving in the background if this USNA plot to weaken Japan's mages is one of the things Shizuku passed on to Tatsuya after her return. It means this may very likely be another plan instigated by the same powerful individual who we learned actually started the Blanche and Vamp incidents. God I love this LN.
I said we need to see Vamps arc release and translated to see the real after math of the Halloween events, like say: Mayumi and Mari will not take all Tats affirmations for granted, knowing hes Military and most likely theres Information/actions restriction Public release, like when the talk about the magatama, far I saw on summary shes look for tag with Him, instead just listen Him.
From reading the later web arcs they take it no further than what they've been told. Mayumi only once privately contemplates on what she has seen already. There is no actually part in the web arc where Mayumi shows knowledge of the the name 101st. No one among his school friends investigate Tatsuya any further except for Erika. And she only does so because a close loved one got hurt and the incident involving some heavy magic use was somehow all mysteriously covered up. We'll have to wait and see if the published novel goes further.
I agree its obvious Mayumi and the gang in v7c10 know Tats is part of a top secret military JSDF unit, but from what Sanada said in that chapter, only people like Katsuto who is the Juumonji's designated heir and the current representative of his family when the 10 Master Clans have their Conferences would have the required access privileges to the actual name of the top secret unit and what weaponry they use and what they are capable of. Inspector Chiba was questioning what imaginary force Tats was claiming he is from when they met as Mayumi was evacuated in web 3. The younger Chiba knows about the major as he is also in the military and Kazuma is a famous military figure, but only heard of the special squad it seems as an urban legend.