It's kinda funny how Scifi like your statement sounded like Nameless Ghost, maybe because instead of magical beings, life forms in fiction makes one to think of aliens and stuff?
What is ゆ with a tenten really? I always like to think of adding tentens to be emphasis, or in this case to adequately convey how agnozingly painful their screams are. Does it technically change the translation of "yu" into something else, kind of like how I've seen ウ with a tenten become bu?