[Echizen777]

Originally Posted by SoboSobo

i agree with most of this.
Yes miyuki was educated in the becoming the head of the clan and her motives are obvious as the sun in the sky, her motives being changing the way her brother is treated.
Side note besides Maya, Hayama and very few members of the clan, the rest of the clan has no idea how powerful tatsuya really is hence why other members view him the way they do.
maya is stated to be the strongest magician in the yotsuba clan, in lamest terms hse can kick the other members asses and tatsuya can beat her in a magic battle.

What do you mean by hse? I agree that Tatsuya will beat Maya fairly easily but he can't possibly beat the whole clan. They are not fodders like in the Yokohama arc, they are all gifted magicians from the master clan. Let's put aside Maya and imagine him Tatsuya alone face to face with the whole clan. You think he can win?
They'd murder him, even if they are less numerous they would win against the whole Saegusa clan. Tatsuya can't beat a whole clan of gifted magicians, nobody can do this. The only way for him to succeed would be to put himself at a reasonable distance and use MB to attack all of them by surprise, that situation is unlikely.

The reason he doesn`t go against them is not he can't take them on but to wage a war against the clan will put miyuki in danger.
So far he only obeys maya's orders that are related to miyuki's safety, i don`t think tatsuya being her guardian is really that dependent of the fact that he has to obey her orders more likely on the fact if hes not his guardian they are in deep shit.
Remember when maya told them that minami its in training to replace tatsuya as guardian miyuki was one step away from unleashing a blizzard , tatsuya stopped her.

He has no reason to disobey as long as he is Miyuki's guardian and that she is safe, he fulfills his role of guardian perfectly, he disobeyed only because Maya wanted to remove him and it is stated that the reason he is able to be her guardian despite his gender is that he has ES to keep an eye on Miyuki. Maya fears him but he hasn't the advantage against a whole clan. Minami is the one who should have normally been her guardian but it's true Maya can observe them better now.

Spoiler for From V4:

"For now, I still don't have enough power. In a head on situation, there
is a possibility I could defeat the 'Queen of Night' Yotsuba Maya. My
'Decomposition' has good compatibility as a counter to her 'Night'
after all.
But the me as of now, even if I could beat our Aunt, I can't do
anything about the Yotsuba. Force of arms alone, the threat of violence
alone is not enough. If I displace our Aunt, another worse manipulator
would simply show up in her place. At this moment, I can only
follow."
Those words weren't so much to convince his sister, as for himself.
As he tried to satisfy himself that way.

He is talking about fighting 1vs1 against Maya here. Face the whole clan is impossible. He needs a plan, allies and many other things to win in that kind pf confrontation.
He works for her, let her the parasite, I don't even think he wants to do something against the Yotsuba, he would gain nothing from that, Miyuki is planning to be the heir anyway, he probably just wanted to soothe his sister. He is a Yotsuba himself(even if he is hated and not accepted), what benefits them, benefits himself and Miyuki as well.

He obeys since his childhood, Maya doesn't want him t betray them but he
And maya knows if she tries to separate those two all hell will break lose in a catastrophic sense.She managed to put minami as a guardian but without removing tatsuya , even though miyuki was unhappy with the arrangement she didn`t protested because she has bigger goals in mind and a confrontation with maya at this point will not server in achieving those goals.
I think on some level miyuki understands that mays already chose her as the heir because maya fears that both the sibling would turn on the clan otherwise. Dealing with tatsuya alone will be insanely difficult but adding miyuki, which its not some push over magician, to the mix will make things even more impossible. Not to mention an internal strife in the clan will make room for others to take action against the clan as well.

Miyuki is Maya's subordinate, she is in no position to protest. She is a favorite with or without Maya's help but of course she will protest if they want to replace Tatsuya, thing that they will never do.