Looking at gradation of monstrosity traits in captured subjects, first we have that Man Eater, who just kills men but still looks quite normal, then we get Bloody Mary, who only can live by eating human flesh, has insane regeneration and strenght, now we will get a horny demon Suspiria who may share the same traits with Mary, but also is a very powerful sorceress...
If I recall correctly they create these monster girls by putting some kind of "dark cell" into the subjects, possibly diretly into their brain which then affects whole organism, as some kind of permanent enchantment.
But I think Suspiria is too unstable mentally to "evolve" properly into the new being.
That leaves May as the best subject to survive the process correctly.
Bern is away with her own problems, now they will have Suspiria monster on the run as a distraction, so no one should notice that May is not here for quite a while.
Next pages should be intense.