Regarding the shark tooth girl.... no she aint a monsters girl, trust me I know.
Her scene is..... disturbing at the minimum, outright repulsive if I am to be completely honest.
Its very clear to me why she was created. Its for those niche lunatics that enjoy guro and the even newer trend of the girl swalling the person a whole and melting them in their bodies
(usually can be found in monster girl hentai... yes, I know trust me ).
I personally find both of these fairly unsettling, not appealing at all and in all honesty pretty damn psychotic. As pretty much every man out there I can "do my bussiness" to almost anything at least remotely sensual, but this shit which is a creation of a troubled, broken mind, is a downright turn off, shrink and hide in the body type of deal killer.
Regarding this girl specifically I dont like the shark teeth design, but if well done I dont mind it as much. But her H scene, yeah.... no. Thats not what I call well done from a general audience, standpoint, not someone who likes this type of things.
So yeah, this chick was made for a very specific group of fetishist, and while I am not one to shame a persons kinks, there is a limit to what is a kink and what is a psychotic, show of the disturbing part of human psyche.
(Now it might sound hyperbolic but to a degree I am extrapolating this to the paragraph above, thank god her scene WAS NOT as bad as some of the things I`ve read, that started normally but turned into this crap shortly after.)