-an interesting concept, but I just hope he doesn't think completely with his cock, "she is beautiful, she is better with me". if you want to add Yasaka, Grayfia, Venelana, Shuri or Phenex lady, do it with situations where it makes sense, no that because you want it you have to add it to the harem. If you are going to add anyone you mention, give them a story and do not accumulate women like pokemon, first focus on what you have and if you are going to add more, do not leave them lying around, give love to all equally.
-It is tedious when the MC flirts with someone, adds her to the haren, has sex and never talks or has a date with her again until the author decides he needs more. sex scene of her.
"and to finish" =
the character I like to recommend for the haren / faction:
Raynare (she is a bit sadistic but she did what she did for love with azazel and also only has a superiority complex easy to eliminate, it could be like your secret operations of black operations, when you know that doing something is not the right thing in public so you do it in secret, and you could have the two that accompany it as a plus)
Sona (the woman who moves her lenses xD, she is a great strategist)
Tsubaki (bellesa fria) (idk she great, good swordswoman, back in beauty of sona)
Aika (in the light novel she became a very good magician, but I do not remember her name, if it is not so t aika, it is that girl with glasses who was a pervert in the issei class)
Murayama and katase (those two girls in the class where the trio spied, the ones with swords)
Gabriel (could fix the gods system)
Grayfia (good warrior maiden and ice mage)
Venelana (sexy and probably could be the director of meetings and things at official parties, past noble cause)
Serafall (maou, to calm the other factions, and I like their childishness, others might say that it is annoying, but that is what makes it different from others and more accessible)
Ingvild leviatan (she can literally control dragons, or she joins you or you kill her, because she could literally control mc if she is strong enough)
(Obviously all the MC in this world)
Rias (the destructive power is Op if it is well trained, it can be mimamda, but with good "spanking" and training you can have a more pleasant "Rias")
Akeno (he is a little nephilim, neither sacred or demonic elements are his weakness, sadica xD)
Asia (a healer = many think that it is useless and not necessary, I say that it is the main piece in a combat. Better when it has a dragon as a companion xD)
Ravel (Phoenix tears, good secretary)
Xenovia (durandal> good swordswoman, just teach her common sense xD)
Koneko (nekoshou devil op, they were experimenting with their sister for a reason, only sairaorg was op and I only use touki)
Kuroka (same as her sister, only because of the experiments, she is no longer a pure nekomata, good choice for nobility)
Kiba (I don't care, any character in dxd who prefers to train technique over power is respectable because training power is easier than perfecting a technique. (In her feminine form she is a beauty xD, if you have seen the illustration of the novel))
issei (I put it too, because it can be good to have him as a subordinate, that if. first I would be to take out the pervert, by his case I make him an obedient butler xD, and of course he yes is a woman much best)
Gasper (friend, vampire who can stop time, this law trap needs a gender change)
Rossewaise (he is one of the best magicians in valhalla, according to the light novel. Also a good secretary)
Leviana reni (I don't know much about her story, because I haven't read the novel, but I do know something, because I read a few paragraphs where they put her as a good magician and that she has a "sacre gear", I don't know if it's true, but It would be good to have her as a wife and part of your nobility)
yasaka (strong yokai, I have never seen her put in her nobility by any fanfic who is from xdx, she is also a good ruler, a good wife, among other things)
tiamat (dragon of chaos, if you have it in your nobility, you have a powerful dragon)
yubellana (from the riser phenex nobility, good magician like akeno hajima, plus the others who are in her riser phenex nobility, have their potential)
etc
