Since it will be too long for a comment, I'll put as an answer.
She isn't the same personality, Suzuka. She's in the role of a Crusnik, a powerful being different from her non-Crusnik personality (which was more timid).
In the video, though, you see that before we hear her voice, the male character displays shock; he is being overcome with a freezing "spell"; his fear is evident; her body then changes from relaxed and submissive to standing firm and commanding, confident; lights show behind her; and then, after all of that is shown, her voice takes on an ethereal tone which reverberates throughout the area.
That it was I meant by showing. Simply saying,
"Fools, you dare enter this town, start trouble and attack my friends without gather information, ON WHAT DENIZENS DWELL HERE" Suzuka responded, her voice taking on an ethereal quality, reverberating across the land.
does not carry the same weight. And, as an aside, whenever a writer switches to typing in all caps (the standard for screaming), I always read into it that they are screaming that they lack the means of showing me what they are trying to convey.
No, I do not know writing from the genre you are in, but consider the difference in this re-write:
Her crimson eyes glowed. Fate watched as her hands turned to claws, the nails turning a deep purple. Raven wings burst from her back, unfolding to be twice her size. Fate took a step back, "Suzuka?"
Shock took hold of Levi -- a human; a human with no protective gear, much less magic surviving Seikou's attack? "What the hell!" he said, breaking free of the shock for a moment.
Suzuka turned her head upward to face them. The moment she spoke in that voice, that voice from another world, Fate had been answered, Levi had been answered. Her voice as powerful as her presence, Suzuka said, "You dare enter this town? You bring trouble and attack my friends. What fools you are. Did you not think to gather information on what denizens dwell here?"
I am sure there are many, many others here who could have done that far better than I. My goal was to show the scene more than to tell it. Through the responses of others and the description of the transformation, so that mentioning the voice as merely "that voice from another world" provided a sufficient description. In fact, "her voice as powerful as her presence" is meaningless unless we can already "see" her presence, hopefully even "feel" that presence.
Again, others could do much better, but I hope that conveys the intended point.