10. Alois Trancy(Kuroshitsuji)
Though, not really a canon character(though, he might still have a counterpart in the original manga, it's still too early to say). Alois does have a lot of fangirls. In his debut, he is seemingly being portrayed as someone who is even more messed up than Ciel. Poking his servants eye, disrespecting his own family and treating them horribly, like their nothing. Like Ciel he did made a deal with a demon, and wants revenge against Ciel, since he thinks that it was Ciel who is responsible for his friends death.
Alois is last since in the end, he turned out, to be not really as cold hearted as Ciel and is even just more of a spoiled brat who didn't know his place. Nevertheless he is more evil than your average kid in an anime story.
9. Ciel Phantomhive(Kuroshitsuji)
When you made a deal with a demon to gain nothing but revenge, it does qualify as somewhat evil, since there is always a thin line between justice and revenge that can go wild. Well, Ciel did just that, and only as a child. Like Judal, he is also a spoiled brat due to his noble heritage and high status in society being an aristocrat himself. Despite his age he has already killed people and ordered to kill many of his enemies. Ciel, is the Queen's Guard Dog, the one who disposes the enemies of the Queen, and Ciel is doing it efficiently at the moment.
Under the guise of being the head of a toy making company, Ciel track down and disposes any one who might be a threat to the empire of Britain, take note Ciel is doing all of this despite being just a child, it's enough to send shivers to anyone what he will be like in case he grows up and he's revenge is still not fulfilled.
8. Lelouch Vi Britannia(Code Geass)
Though Lelouch is not completely evil and has good intentions at the end, he does have lots of moments that makes him look like a genuine evil overlord of the world. Lelouch Vi Britannia is here because, though it can be argued that he did regret his actions at the end and tried to make up for it, He still cause a huge war and manipulated many people in order to get what he wants. He made the war look like a fight to liberate the Japanese people but in truth all he ever wanted was revenge against Britannia.
His continues use of Geass to manipulate the wills of the people are also clearly immoral and he knows it. He also doesn't mind killing his own flesh and blood if he suspects they have something to do with his mother's death, ironically it was him who put an end to her when he found out that she was still alive in some form and is just using him.
7. Light Yagami
Light Yagami, like Lelouch, hopes for a better world. unfortunately unlike Lelouch he lost his way and considers everything he does to be right in the end. Light Yagami was originally just a genius high school student until he found the Death Note. Since then he decided to become a God and kill all those he deems as "evil". He later became knows as Kira, meaning killer. Not only did he became self righteous, he even sacrificed his own family and friends for his plans. at the end of the series, light is already so messed up that he feels that he is invincible, his overconfidence eventually cost him his downfall. Nevertheless, it took L, Near and Mello to finally caught him, with L and Mello dying in the process. Light is definitely one of the most dangerous evil genius of anime.
6. Judal(Magi)
Judal, on being a bishounen, I think it is without question since he has an army of fangirls from the moment he appeared on a mangga page and on screen in anime.
Judal, loves war, that alone already qualifies him as someone who is evil. Judal has already killed people at a young age and loves to make people feel absolutely bad every time he opens his mouth. He is also later revealed to be a huge spoiled brat, being raised by Al Thamen for him to get anything he wants and was not thought any values or manners. I hope he doesn't change any time soon.
5. Izaya Orihara(Durarara)
Being the closest thing the Durarara series can have to a main antagonist, Izaya Orihara, the informant of Shinjuku and Ikebukuro definitely qualifies, as an evil bishounen. Though there is some issue whether he can be classified as someone who is "evil", everything he did to was intentional and he clearly knows or at the very least has a general idea what's the result's gonna be, and that is them creating a huge war in the entire city, all of this just for his own amusement and best Shizuo of course, that's just a bonus though.
Izaya is probably my favorite character in this entire list since its not really that hard to love him. though he's a jerkass or rather the King of all jerkass, he does it all in a very sarcastic and funny way, at least most of the time. However, there are times that he can be very scary, when his plans started involving a lot of innocent people. However, despite him being my favorite there are bishounens out that are far more evil than he is.
4. Yami Marik(Yu0Gi-Oh)
One of the most iconic villain not just in Yu-Gi-Oh, but in anime history as well, along with Yami Bakura. Yami Marik despite being a pure force of evil, has a lot of fangirls, It seems people love sadistic, crazy psychopaths. Yami Marik is born from the culminated hatred of Marik Ishtar, a being bron from the darkness of someone's heart, unfortunately for Marik, Yami Marik has no intention of letting that be the case. Yami Marik wants to be the original Marik, he can only accomplish this by destroying the real one.
His goal is quite simple after that, in his own words, destruction, chaos and bring everyone into the very depths of the shadow realms where the only thing that they can feel is despair and suffering. All of this from a villain from an anime about a card game, Yami Marik truly knows how to be evil.
3. Yami Bakura(Yu-Gi-Oh)
Probably the main villain of the Yu-Gi-Oh series, and the most well known in the entire franchise. Yami Bakura wants nothing more but to bring hell on earth, the destruction of not just the world and to cause chaos in time and space by changing history itself. Yami Bakura's true identity is that of Zork Necrophades, the legendary dark lord. Yami Bakura wishes to revive his full powers once again by collecting all seven Millenium items and bring forth darkness across the world. Yami Bakura is the most ruthless and persistant of the villain in Yu-Gi-Oh, they just can't kill him no matter what.
While seemingly a lesser threat than both Pegasus and Marik at first, Yami Bakura disproves this by outliving them both and becoming the final villain of the series.
2. Nakago(Fushigi Yuugi)
Though, I'm not really a die hard of Fushigi Yuugi, I must say, I like Nakago very much as a villain. he turned a love story into an all out war and even brought a lot death and manipulation in it. Without Nakago, it's really just a love story between Miyaka and Tamahome, which is boring by the way. Nakago is a love to hate villain. you love him, for how good he looks and how he does it all, you'll hate him if he ever does it all to you, cause he can make your life miserable.
1. Naraku(Inuyasha)
Naraku, without a shadow of a doubt, for me is the most evil of all the bishounen like villains. this guys is the main antagonist from the very beginning, as in even 80 years before the actual start of the series. Naraku has made nearly everyone's life in the Inuyasha series miserable. also, before, there was a an Aizen Sousuke, an Orochimaru or Blackbeard, there was a Naraku, its quite possible that he influenced the concept of villains such as Aizen, Orochimaru, Mard geer and even Elder David in Magi. Naraku was the original bad guy who is responsible for everything and just won't die no matter how much you hate him. He always, always, manage to find a way to escape death. He has an awful lot of tricks and an awful lot of sins.
