I think Isaac netero would be good but I also think it would be interesting if it were Roy mustang. I feel like you need an old school straight laced character to make the group of students understood the life they will be living now and make sure they understand reality and understand that what they will be doing is dangerous and can and will get them killed or those they work with.

I would say add the girls from atla, Korra series optional. could also do Danny phantom and treasure planet. also if your trying to make it easier to get the disney princesses you could use the sequel to wreck-it Ralph, Ralph breaks the internet. food for thought

I think overlord would be good maybe have arche be the one in the chat group. magic system is stable and easy to understand and goblin slayer as well could be interesting, don't see a lot of gs fanfics. as for the harem from kimetsu, do as you please. I'm far more interested to see what will be done by you and offer occasional thoughts and be surprised.

magi, out of those worlds in my opinion most benefits are there. He could get a good metal vessel and in my opinion the girls in it aren't bad magic could be very useful short and longterm through his journey. sure the difficulty is high but so is the benefits and if he ends up having his own dimension like asora from tsukimichi he could have his own dimension and kingdom if that's what your going for. food for thought.

hotd and arifureta wouldn't be bad ideas but if your looking more obscure you could go with hundred or Kaze no stigma or maybe rakudai no chivalry. all have decent girls different rules pertaining to their worlds and what not. and for guilty pleasure food wars!. got to know how to cook to feed the harem, it's vital for his health and sanity.

I agree and to be fair I don't mind him getting Narcissa or Bellatrix, both were women with high magical prowess and good lineage. they would have made fine witches and could have been useful to society. Instead their lives ruined, their reputations tarnished and their home live gutted. I see this as a chance to be witches they were suppose to be, also could add the minister. She doesn't seem to mind the idea to a degree nor does he. the minister of magic and house of Peverell could be a good partnership and a way to dethrone Dumbledore publicly. food for thought

I say go for it your in underworld, that's a good place to continue your story its still early in that world.

I think either way works, Fiona is a warrior through and through. she enjoys battle, she would fit with Jin in that aspect and continue to grow. A warrior queen in the making one who fights on the Frontline and defeats her enemies plus could get to see Jin vs prince charming and fairy godmother could be interesting. I. the end either life could work for her and both would I imagine end well for her so it comes down to personal preference and nothing more.

+1