User blog comment:B214/Volume 23 discussion blog/@comment-1359322-20170220174230/@comment-30924344-20170220181152

@Gary She is confirmed harem member now because that trio is in Issei's harem and it would be odd for a none harem girl to join because it breaks that trio of harem girls, so only a harem girl could join to make it the quartet of harem girls and all be church girls at that.