Board Thread:Questions and Answers/@comment-37185619-20181020220225/@comment-26509240-20200402005753

As per harem rules, if the girl likes him even slightly even if their relationship is scorned, they're a part of the harem. Regardless of how thirsty they are, just being there for the sake of the MC after their own arc is sort of the gist of harems for LN. Even manga goes by this logic. So yeah, as long as Kirito is surrounded by more vaginas than dicks, people are going to treat this like a harem regardless of whether or not Asuna got dibs on his ass.

As for the girl he would most likely bang, I hope to god they don't introduce selfcest and bring his GGO avatar into this. At best, I would say Sinon given that she ain't related to him, not a scorned friend of Asuna, or too young to shag. Bonus points for not being dead with a disease and not being virtual.