** Hakumen no Mono, born from hatred and rage from [[spoiler: Tora when he was human]], delights in destroying countries, having done so for thousands of years until 800 years before the story, when he was hit by the Beast Spear, and Japan's Bakemono and Human population teamed up to defeat him. In response, he holed himself up below Japan, and if he was removed, the country would sink. From both Ushio and Mayuko's families, a BarrierMaiden is chosen to keep him imprisoned, but after 800 years, he got stronger. His worst acts are during the time between the weakening of Ushio's mom's barrier and his awakening. First, he sends his Bushin's out to attack the Kohemei Sect and Japan, one of which manipulates a boy named Kirio by becoming his mother figure. Then he uses a special type of demon to systematically wipe out everyone's memories of Ushio and Tora, including Asako and Mayuko. When he awakens he ceases no time whatsoever causing fear and hatred by nuking an island, twice, while Japan sinks.
** Guren, TheDragon to Hakumen no Mono, was a vicious mercenary and murderer in life before he found [[ArtifactOfDoom the Beast Spear]]. Enjoying nothing so much as killing others, he used the Beast Spear on human beings until it devoured his humanity, leaving him as the monstrous, black-furred Guren. Guren would spend the centuries hunting down and devouring humans: men, women and children alike. Finally, he devoured the family of a man who would take the name Hyou and the two inflicted wounds and scars on one another, earning a mutual hatred. Hyou would hunt down Guren, following the trail of his atrocities. In their final duel, Guren tried to gain the upper hand by holding a woman and her child hostage, knowing Hyou would remember his own family. Guren planned to kill Hyou when his guard was down and then devour the humans as a post-victory treat.s...
* UncannyValley: So, OurMonstersAreWeird yes... Now add assorted limbs, faces and naughty bits that look COMPLETELY like an ordinary human's on almost random places on the bakemono's body, and it gets even freakier. Examples: A perfectly bad-ass looking crab bakemono which is then revealed to have HUMAN FACES on the inside of its claws; numerous lesser bakemono with mutiple HUMAN ARMS AND LEGS instead of more practical for fighting claws.
* TheWoobie: So, ''SO'' many characters.
** You will want to give Tora [[spoiler:AKA Shagakusha]] a hug once you learn his backstory.
** Same goes for Hyou.
** Some of the bakemono enemies even, though it doesn't excuse their reaction of massacring all humans they meet.