u/JerryEarthC137

I don't know if this was brought up. Basically the events of the series are almost all Kasukabe's fault, although his intentions are always quite pure. He teaches Aikawa about sorcerers' bodies, assists him in becoming the boss and fusing with hole, which leads to the cross-eyed and their extensive knowledge fighting sorcerers, and later not realizing the consequences of his actions and helps create shin who is the one to tilt the equation between sorcerers and humans and destroys the residents' only defense force, as cruel as they were. In my opinion, he is the closest thing to a god, in a way, after Chidaruma and Hole.

He is definitely the most important plot device in the series, don't you think?