The Illusionist Archmage has crafted quite a good image of himself to the world.
But those who fought against him during the early years of the Fall, knows how cruel and how terrifying he could be if he get serious.
Especially when it is about the people he cares about. He could endure people spitting on his face.
He could take it casually and some even might think he is too gentle for his own good.
But if you began doing the same thing to people he cares about, then he could even destroy heaven and earth to make sure you suffer.
Hence, the old Kazoku all die other than children and none of them could really fight with Hikigaya.
This is a long time ago. The affairs of the world is impermanent and just like the beginning of the Fall, Japan is once again isolated from the world
Secede ding from the World Government, cutting off contact with some nations and keeping to themselves.