Kamui

Kamui (神威, Kamui) is a Basara Impurity and the youngest of the eleven Basara. He is responsible for the death of Benio's parents.

Appearance
In his old form, Kamui was larger and had big spikes on his shoulders, along with a big horn and Impurities net/number sign on his chest.

After gaining more power and new form, he shrunk into a 13-14 years old child-like body. His skin is dark and he has shoulder length gray hair. He retains the net/number sign on his chest. His left eye is completely black with a red pupil and also have cracks around it, while his right eye is gold-colored.

Personality
Kamui is calm yet ruthless, having no mercy for humans or other creatures, he does not care about their feelings, comparing them to mere insects. Though, he tends to often let his opponents choose the death of their preference, and always gives them ten seconds to decide. He seeks entertainment by fighting humans without caring about which side (Human or Impurity) will be destroyed, and loves humans because, despite the fact that they are weak, they continue to passionately struggle and strive for their lives and desires against forces stronger then them. He also likes fighting strong beings and loves life-and-death battles. If his 'preys' are being snatched away by other opponents, he is willing to give them power as shown when he gave Benio two legs after her own were ripped off. However, this isn't an act of kindness, this is just to make sure he will have an interesting battle with them afterwards.

Plot
Six years ago, Kamui (in Kegare form) was confronted by Benio's parents. He was able to defeat them and grabbing them, he had their eight-year old daughter choose to pick which parent he would spare, giving her ten seconds to decide. However, she was too scared to pick, so Kamui asked her parents whether he should spare them or their child giving them ten seconds to decide. Without hesitation, they both stated he should spare their child and Kamui killed them as promised. This encounter made Kamui remarked that all the people he made decide they were the rare exceptions as they didn't try to save themselves.

Years later, Kamui gained a new form and went about the Magano looking for the Twin Star Exorcists killing any Kegare or Exorcists in his path. Kamui then confronts Benio who was about to kill three Kegare, he easily destroys them knocking her down in the process. He proceeds to question her over where the Twin Star Exorcists are. He threatens to kill her if she doesn't answer giving her ten seconds to pick. This causes her realize who he was and say his name. Kamui (not remembering her at the time) was surprised that Benio knew his name as she stated she has been searching for him years for what he did in the past and attacks him only for to knock her aside and subdue her by stepping on her head.

Kamui tauntingly asks Benio if she remembers every face of insects she squashes and prepares to kill her but he is punched by Rokuro Enmadou whose his strength interests him as does his Kegare arm. He watches as Benio informs Rokuro of his status as a Basara. When a Kegare he fought earlier attacks him, the two exorcists take the chance to briefly retreat and Kamui kills the attacking Kegare. He soon wonders where the two exorcist are until Rokuro returns and battles him managing to put up a better fight than Benio. Kamui states he has never been this entertained and gives Rokuro the option of continuing their fight or letting him go since he potential giving him ten seconds. Rokuro questions him over this as Kamui explains his habit of enjoying to see what options they will choose and seeing whether they will turn on their comrades to save themselves while very few have choose to save others. Mentioning this makes Kamui remember Benio from six years ago and he explains to Rokuro over what happened to her parents.

When Rokuro asks how he could do that in front of a child and how he can be so corrupted, Kamui remarks that's what makes him a Kegare. Rokuro then angrily punches him and blows him away with a series of blows. An amused Kamui mentions that Rokuro might be a person who might make him use a cursed talisman. With the talisman, his legs take on a new form and with a leap he attacks Rokuro who tries to block but fails as Kamui kicks Rokuro aside. Kamui explains the power of his talisman before noting what shape Rokuro is in. He tells Rokuro that he went through the trouble of activating his power and tells him to entertain him before moving to kill him before Benio returns and attacks him making dodge. Kamui tells her to step aside as fighting her is boring and when she attacks him again he notes on her improved fighting before he knocks her away.

He then watches as the two exorcists then combine their powers which makes Kamui realize they are the Twin Star Exorcists. He leaps at them telling them to entertain him some more before they fire an attack at him.

Kamui emerges with half his leg destroyed, he remarks he was naïve as Rokuro and Benio were the Exorcists he was looking for. They question his knowledge over that as he remarks about the prophecy of the Miko destroying all Kegare has been spreading news amongst the Kegare who want the exorcists wiped out. He tells the two he does not care whether the humans or kegare are exterminated only if he is entertained.

He states although he should kill them before the Miko can be born, he decides not to as they have entertained him more than anyone else has and decides to leave telling them not to be defeated by anyone and to get stronger so that in their next meeting he could use only half of his power. He states they are now his prey and he looks forward to fighting them again or tells them they could have Miko so he can battle it. With that, Kamui leaves the area.

Later on, having recovered his leg he witnesses Rokuro and Benio's battle with Yuuto Ijika from afar. He then arrives on the battlefield where he saves Benio from a swarm of Kegare remarking they are having fun without him. He questions the wounded Benio over whether she wants to continue fighting and if she wanted the power to do so. She questions him over this as he tells her he can give her wounded legs Kegare powers legs like Rokuro's arm.

Benio asks him why he would do that and his gain from that as he tells her that its for pleasure as he enjoys fighting strong people and seeing their potential to get stronger so he can fight them again. He remarks the way her brother Yuuto is flaunting his strength is irritating and he gives Benio ten seconds to decide. Before he can finish counting, she tells him she wants the power to stop her brother and the power to kill him. Amused by her answer, Kamui tells her if she turns into a kegare he will take responsibility and kill her himself. With that he proceed to use a spell on her legs enhancing them with Kegare powers. He is shocked that even though it is corrupted power it is beautiful.

Powers and abilities
As one of the eleven basara, Kamui has great power that outdoes the power of a regular Kegare or Exorcist.

In his Kegare form, he was able to overwhelm countless exorcists.

In his humanoid form, he has been shown to have tremendous strength easily dispatching several Kegare or exorcists in his path. When faced with a powerful exorcist like Benio Adashino, he was able to break Benio's leg with just a flick of a finger and destroying her holy sword with just a hand raise.

He possesses great durability shown when took several blows from Rokuro Enmadou and his kegare arm. He was also not fazed by having half his leg destroyed as a result of taking a combined attack from Rokuro and Benio.

He seems able to regenerate as he was able to regain his leg after it had been destroyed.

Kamui is capable of granting Kegare powers to exorcists as shown when he performed a spell that gave her wounded legs powers like Rokuro.

He possesses a cursed talisman, when he faces strong opponents he uses it to enhance the strength of his legs.

Trivia

 * His hobby is asking humans for their decisions.
 * In the anime,he has shown have hair and green markings on his old form,implying he was a impurity corruption.

Quotes
— to himself
 * "Seriously, those humans. They don't know when to give up, do they? How many times is this now? Give me a break."'

— to Benio
 * "How about you? Do you remember the number and faces of all the ants you've ever stepped on?"'

— to Rokuro
 * "A quick and easy death, or a slow and horrible death. Which would you like? You should choose the death of your preference. I'll wait while I count down from ten."'

— to Benio
 * "I like you humans because you're weak. You weak humans, in your own weak ways, struggle and squirm... and you challenge me with a burning passion."