In the events of Yami o Terasu Mono and Zero: Black Blood, given humans as payment for their loyalty as familiars, the Inga Horrors are shown to be significantly weaker as they can be killed by Makai Knights at a quicker pace.
Despite the slight increase in physical ability granted to them by the game world, the players, being otherwise normal humans, are quickly overwhelmed by even one of these Horrors and generally opt to either flee or hide when encountering one.
While the full range of her powers are never revealed, Messiah's abilities include magical shielding, animating her body tattoos into cannons, summoning Horrors by merely touching the ground she walks upon, and flight.
Though only a shade of her true self, Messiah offers to give Barago the knowledge and power of the forbidden Makai methods in return to bring about the legendary Kiba.
But once he fulfills his part in her summoning by removing any trace of humanity in him, upon being awakened Messiah absorbs Barago using Kaoru's body as a medium to use his power to complete the process.
In reality, she is a Horror created from the corpse of a girl Kurusu murdered prior to his transformation and altered to resemble the real Shion who died long ago.
Gyanon (戯阿音(ギャノン)) is one of strongest Horrors in existence, labeled as Messiah's Fang (メシアの牙, Meshia no Kiba) and the Ancient Red Demon Beast (太古の赤き魔獣, Taiko no Akaki Majū).
It is revealed in Makai Senki, that Sigma Fudō had stolen Gyanon as he intends to utilize the Horror in powering up his Magōryū Idea while reviving the fiend with large numbers of human sacrifices.
Though Kouga is freed, Gyanon awakens after Idea's creation in response to Sigma's darkness, devouring him and assimilating the ultimate Gōryū while assuming his androgynous human-like form.
However, other than Ryuga seeing Hakana's memories, there is adverse effect from killing these Madō Horrors one by one as the armor temporary regains its glow while rendering it unwearable for the moment.
Zedom (ゼドム, Zedomu) is an Ancient Horror, labeled as the Battle Commander of Slaughter (殺戮の闘将, Satsuriku no Tōshō), whose body is composed of various blocks and alter themselves into weapons.
Due to Tousei's actions fifteen years prior, Zedom's arm briefly emerged from the corrupted seal it was trapped in, infusing Hakana with more seeds than initially intended and knocked her out.
As a result, Zedom begins to destroy the Goddess Statue in order to break free from his prison while having Sonshi acquire a Makai Knight to serve as his new body.
Taking the lifeless Sonshi after he was killed as a vessel and altering it into a militant dressed form, Zedom attempts to recruit the Makai Knights in serving him before resolving to remake the world in his image.
Further weakened by a special arrow fired by Aguri into the said spot, Zedom is slain by the combined effort of the Makai Knights under the Garo armor's influence.
Ring (リング, Ringu) is a powerful skeletal and anthropomorphic bird-like Horror who is the main antagonist of Zero: Black Blood, appearing in the form of a handsome European gentleman dressed immaculately and predominantly in a white suit.
Ring's plan also relied on Iyu's calming singing ability, having also fallen in love with her to the point of obsession as it allowed him to maintain his sense of self, and keeping the humans serene and indifferent to the arrangement.
Accepting Busujima's wish to bring back his lover, Eyrith produces a cloned body of Akari that will come to life the moment Horror is fully grown and blooms.
Ultimately, the fight ends with Eyrith revealed to be the one who took Raiga's parents from him before she uses her temporal powers to suck out the Makai Knight's remaining time in the Garo armor so he can drive off his friends in his Lost Soul Beast form while she can bloom without interference.
He killed the Makai Priest Sōtatsu before being slain by the latter's creation Agō, with only his arm remaining as it was eventually sealed in a small shrine located in Line City since it could not be destroyed while the remainder of his horde were wiped out by a previous Garo.
Despite unsavory first impressions, Jinga developed feelings for Amily as the two married and traveled the country to hunt Horrors while training their son Yuto (ユウト, Yūto) to become a Makai Knight.
Regardless, Jinga later abducts Gald in an attempt to find where he has hidden the Hōken, but he still has a fixation on Ryuga and orchestrates a side scheme to have the young Makai Knight give in to his darkness.
Jinga later reconstitutes Amily's body and the two enter Radan before assuming his place as its king, while directing the giant to make its way to the city to take everyone's life energy.
In Garo: Kami no Kiba, the Horror Rinza tricks Banbi into resurrecting Jinga, as a fallen Makai Knight is needed to activate the Fang of God.
Jinga then joins the fray while returning their knights' Makai armor to defeat them as the Fang of God activates, his memories fully restored as he kills Rinza while revealing his only motivation is settling the score with Ryuga.
Jinga eventually begins manifesting after Mikage followed a butterfly familiar conjured by Amily during one of his missions and once possessed the human to kill Shijo.
The resulting battle from the 'introduction' ends inconclusively, Jinga deciding to observe his reincarnated self and unconsciously manipulated the youth in breaking ties in everyone he knew and loved.
She met Jinga while delivering a Spirit Beast pelt alongside her fellow Makai Priestesses, having a bad first impression of before getting to know him better and developed feelings for him.
Rinza (リンザ) is a centauress-like Horror who gathers information on the Fang of God from a freelance professor researching the Makai community and its lore to summon Messiah into the world.
She can controls a horde of Horror zombies as minions, disguise herself as other humans, and fire explosive spark bolts produced s by scraping the heels of her high-heels on rough surfaces.