Veber

Thx for clarifying it to me. It might be like it and on that setting it would fit. But as guard of the Soul King and on the "good" side it seems not fitting to me. Furthermore the title of this fanfic is the Mage of Zero Division and he is known for being a Kido master who even improves them. And the titles of the Zero Division should reflect that in my opinion rather than something you could regard as Evil. I would just say to be called Demon King then is kind of weird. In the end the author is the one who decides it and either way I wish for the story to continue.

agree with the others his whole gimmick is that he has Magic and even is in the Kido Corps so Magician would suit way more...

Isshin was the head of a branch family. Kaien was the head of the main family

Yea this looks like AI has his hands in it....

I would call him pretty impatient. After all he is the Guy who sees a problem and wants to solve it immediately whatever it takes.

w8 did he travel to this world and just got younger?

No, he is a pretty good ally in the manga

Well also makes sense like a lvl one killing a lvl 100 mob to get insta to lvl 30 butr if you kill it again you only go to lvl 40 [img=recommend]