"WHAT THE HELL IS THAT THING?!"
"I-I-I don't know, Ed! There's nothing in my world that describes this creature!!"
"You're telling me we're dealing with an UNKNOWN LIFEFORM?!"

---

Yes you two... yes you are. A concept of a Eldritch, formless abomination using a corpse of a kitsune maiden, who might have ties with Kiyoshi before her demise. What scary about this thing is that once it uses that corpse as its vessel, it can replicate her personality and mannerisms, making it possible to easily manipulate someone like Kit. But the creature needs to use primordial magic to keep the body from decaying or taking any damage. Ed and Kiyoshi found out the hard way and caused the monster to mutate it vessel to keep it physical form.

Oh... this thing can't die. It has to be sent back to its dimension.

This scene here is based on Tekken Tag 2 where Jun Kazama become Unknown. How the Heavenly Garden track suddenly changes to the Fallen Garden track was hella creepy back when I listened to the OST.