Honestly, Romm is sus, but damn if it is not sketchy.
I mean, he was the one who pulled Mitsue out of her retirement. Had he wanted to just use the girls for whatever business with the shrine, he would not called her back.
Given CH 32, he tested his tools and found them lacking to deal with the shrine on his own, so he went after the girls.
And it is implied a certain conditions must be met to enter it, so that is why he was so insistent to involve Hana.
So, even now, it is very debatable whether Romm's intentions are malicious or no
I mean, he was the one who pulled Mitsue out of her retirement. Had he wanted to just use the girls for whatever business with the shrine, he would not called her back.
Given CH 32, he tested his tools and found them lacking to deal with the shrine on his own, so he went after the girls.
And it is implied a certain conditions must be met to enter it, so that is why he was so insistent to involve Hana.
So, even now, it is very debatable whether Romm's intentions are malicious or no