Although I will likely drop it, I'm not a fan of finding more than one reincarnator ... but I'm pretty sure the women are:
Sona, Rías, shirone / koneko and akeno
And the man is a reincarnator in the body of isei surely
Then you will miss the scene when the MC Defeating the perverted character and his harem, using his ninja slaves from 3 ninja villages, it will be epic to see the Harem character lose
Is this character gonna be from other fanfic or something ?And if the other guy had brainwashed the women will he take them under command to gain foothold in Dxd verse or just straight up kill them?