probably was supposed to be some little sister fetish (since furuya always treated her as his little sister even though they were the same age) and the apparition that possessed her turned it into lolicon - or something.But she's not a loli though, like at all. Unless she transformed her body into not a loli type somehow.
I checked the previous chapters and in the ch33 she stands next to the slayer. So at least she's not exactly him, but maybe she controls him somehow? Dunno.I think she's supposed to be the lolicon SLAYER, not maker (captured last chapter). I thought that maker and slayer were the same individual but I guess not?