Acoms
Guys, I really don't understand those who want a harem. There is no mind that would want a harem in Himiko. He stabs girls at night while they sleep. Also Mc anti villian and you want a relationship with hero girls. I understand that you want a harem, but in the course of the author's story, the Mc will be a villain (I think so). And also, I don't think the hero girls will be the bad guys with them once they find out that mc is the bad guy. But the author says I'll write a one night stand. I don't know about him but (cheating) is a bit sad for himiko. I hope those who want a harem understand my problem. I just want a good story. Not one messed up with a harem.
A harem is needed mainly for a vampire family, because then it becomes meaningless that he can turn people into vampires. You can add Rumi because Himiko will not intimidate her and there will be more or less balance. You can also add Midnight for roughly the same reasons. The problem is that female classmates are not so emotionally and mentally mature to get something good.
No Harem, it would ruin the whole relationship you've made with himiko, especially that you made her yandere. Although in theory you could convince her, that would take time, and I mean years not a few weeks and some bad (sexual) excuse. I understand that as a vampire you have to make your family but look at it this way, you can add relatives / slaves who do the jobs for you and be the cannon fodder. Where the MC and himiko will be the kings, maybe adding to a loli where himiko's maternal instinct is stimulated and helping to heal her yandere state ..... But, it is better without harem, as you have established it would be very difficult to make him harem without ruining everything, besides that what many want is to include some heroines, but they do not realize that our MC is going to be more of a villain