Complete Monster/Flame of Recca

"Recca: Do you actually take JOY in such depraved acts!?
 * Mori Kouran has so many aspects of a Complete Monster (even in looks) that he competes with Haguro and Griffith for the title of most depraved rapist in recent memory. Since he's got so many depravities, let's take a deep breath and count it one by one:
 * He already had wealth and power, but he continues to crave for more and would never stop at achieving so, by using deceit, manipulation, murder, and especially yanking on other people's emotions, and it's implied that he's been like this since he is a child. To that end, he sought immortality, just so he can be satiated forever.
 * He's actually married to a kind woman named Tsukino, but from what it entails, it is probably forced marriage. But then, when Tsukino found Kurei and could possibly treat him as his new good mother, there comes Kouran, forcefully snatching Tsukino away, imprisoning her in a distant house in the mountains, and raising Kurei as an emotionless killing machine. He plants a bomb in her, in case Kurei rebels or becomes useless to him.
 * He then suddenly decided to adopt a kind girl named Kurenai and placed her near Kurei all the time. Kurei was on the way to getting defrosted...then Kouran suddenly called them both and started brutally beating Kurei for getting emotions. When Kurei bluffs that he didn't have any attachments, Kouran instead orders him to kill Kurenai himself, something which froze Kurei to the bone, and he couldn't do it. And since he didn't do it, Kouran did the job instead, gleefully, revealing that he planted the same bomb on Tsukino inside Kurenai, and killed him, causing Kurei to turn her into his flame.
 * While he appeared in public as a donating philanthropist, it was revealed that he hosted a 'fight to death' type of underground tournament called 'Ura Butou Satsujin', where Kurei is usually told to participate. A tournament which leaves many of its participants dead, all while Kouran watched and had other rich people also watch for amusement. Yeah...it's like that. But then, it was revealed that UBS was nothing more than a cover to get Kurei killed because Kouran started to fear Kurei's strength. As he aimed to get Yanagi for her healing powers, which he believed would grant immortality, he got Recca & co. invited there. When Kurei lost to Recca, Koran proceeded to beat him up bad, revealed his clone Renge, blew up the bomb on Tsukino (which was thankfully averted thanks to Raiha), all while gloating in front of Kurei that everything Kurei held dear will be taken away by him.
 * During the Sealed Lands arc (which is AFTER Ura Butou Satsujin), it is revealed that one of the Ura Uruha's hit men, Hisui, was handpicked into the ranks by killing her boyfriend in a battle in the dark. It's revealed that Mori set it up that Hisui would fight and kill her boyfriend and when Hisui confronts him about it, he gloats about how he enjoyed watching it. But his depravity didn't just end there...when Hisui took a Heroic Sacrifice for Fuuko and died because of it, Mori had the NERVE to gloat about it as Fuuko cradled Hisui's corpse and cried for her. This instigated Recca to hit him HARD, and for once, his eyes were of utter anger, and this exchange, which cements his status as an utter Complete Monster, happened:

Mori: YES!!!!"

""People need sleep, food, and sex. Since gaining this form, I seem to have lost the need to sleep. As for the other two...They seem to have merged". (Lights come on in the room, revealing dozens of half eaten women.)"
 * Note that beforehand, Recca generally didn't take Mori so seriously, preferring to mock his Gonk face or affectionally calling him "Mori-chan". Once that happens... Recca's perspective changed, Mori transforms from 'A generally pathetic villain with ugly face' into 'The worst SOB he's ever seen and must be burned to crisp ASAP'.
 * Before the SODOM Arc, guess how Koran spends his time after fusing with...Tendou Jigoku...he hires maids to serve him food but the 'food' is actually the maids...


 * He occasionally had blatant sex with Renge too, all while assuring her that she's his best daughter. But then, when Renge came begging for help after getting her ass kicked by Kurei...he instead responds by killing and absorbing her, revealing that she is born to be that way.
 * He is so evil, that, after going through a metamorphosis, he becomes  and begins gloating over starting a system of mass genocidal cycle of death and rebirth.
 * Mokuren Nagai. He's a sadistic Axe Crazy Serial Killer who loves seeing his (mostly female) victims' fear and pain before killing them and has never given any reason for his actions save For the Evulz. He gleefully tortures the protagonists and uses some of them to put the others into Sadistic Choice situations, and comes back from defeat more than any other villain simply because of his all-consuming hate for Recca and his friends. He starts out a craven Dirty Coward, but gradually takes several levels in badass, and his desire to destroy Recca overrides everything else to the point that nothing is too extreme if it gives him even the slightest advantage, making him even more despicable and terrifying. His sole somewhat humanizing moment towards the series' end - when it's revealed he's begun a relationship with Mikoto, who herself was shown to be quite completely monstrous - is brutally subverted when he betrays and mortally wounds her because he finds it more convenient, giving her an Alas, Poor Villain death. When he finally dies trying to take Recca with him, it is noted by the narrator how utterly morally bankrupt and completely devoid of compassion he was. He also subverts the Morality Pet with Koganei by attacking him from behind after giving an Jerk with a Heart of Gold speech before fighting him.
 * The guy who made the Tendou Jigoku, Kaima. He's like Mori's spiritual ancestor, but he's not possessed by Greed; he just wants to kill and murder for all time. If there's an evil Madogu around, he made it - using children. He's depraved, incredibly evil, and, like Mori and Mokuren, has no redeeming traits. When Recca rejected his power, he took the chance to gloat that he'd NEVER give his power to anyone with a redeeming quality like Recca, so he chose someone who's VERY similar with him, Mori, and both turned into constructs that look like they're from The Thing. . I'm not kidding.
 * Kadotsu, one of Mori's Shishiten, is a Serial Killer who is implied to be from an African warrior tribe, who immediately starts a killing spree of the, to which he later gloats about as well as insults Magensha, for imitating him, enraging Gashakura to a pointless charge. He proves to be so resilient that a   and it had to take a   to do him in. He is also the only one without any redeemable traits.
 * Genjuro, one of Kurei's Jyunshinshu. He and Mikoto were the biggest assholes in the group . He is a spiteful, atheist scientist who forced an innocent girl called Meno into fighting because he shrunk her father, one of his assistants, into an hourglass. And before all that, he used the pretense of a loyal Cool Old Guy to Kurei, only to reveal that he's serving Kurei just to have a chance to avenge his utter defeat in the past, kill him, and take over Uruha for himself. After being beaten by Setsuna, who he summoned him and got roasted, it looked like he was going to be a Graceful Loser and take his death by Neon's hands with dignity.  . He also created a man eating chimera for a twisted experiment, and is not bothered when he was killed.