no, i plan to focus on tortus and earth only.

I never said he would have different personas, nor anybody will have control over the body when he is switching worlds. I have stated from the beginning that this will be a DxD X Arifureta Fanfic. Arifureta has 9 worlds that is interconnected.

Hmm I'm not sure what you mean by serious fic, but it is not directed into comedy. I may insert some jokes here and there, but that's it.

I'm not sure which point you are pointing out, about it is owned by Shinto, is it a point from the original novel? I can't find it in the wiki. I have not read this novel for a long time so I look at wiki for reference.

Thank you for your information, I will keep this in mind.

Well, the very reason I made fanfic instead of original novel is, first,of course to practice my writing, secondly, the character is already ready for use. People know who they are, and how they behave, so I don't really need to build the character much anymore. Mostly on other mythologies, sure there are a lot of character, but it is not mentioned much, so I would need to build the character from the limited information from them, which is not much different from making an original character. IMO, making a good original character is really tedious, more so if I need to include some character building(This is purely from my perspective, I just don't want to do half-baked work). Now, if I were to make a large harem, I don't know how many original character i would need to make if I don't include the devils. I'd rather make a new original novel altogether.

I am writing in first person, unless i need to elaborate something

Yes

Most of them will, For slash/dog characters, I might delay them since I have not read the novel yet. I will need to read them to know their personalities so I could give a perfect interpretation of their characters.