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Kiseki-o「鬼箱王, lit. King of the Demon Box」is a high-ranked possession-type demon of the Black Demon Series. He formed a contract with Shihō Kimizuki and became his Cursed Gear.

Appearance

Kiseki-Ō (Anime)

Kiseki-o appears as an androgynous preteen. He has short light green hair with short bangs and short eyebrows. He has red eyes, pointed ears, fangs, black horns as long as his forearm (only after he drinks Kimizuki's blood), and a fluffy white tail as long as he is tall. He wears a black headband behind his horns and a dangling earring with a sapphire orb on his right ear.

He is dressed in a white sleeveless collared shirt with a black knot with a brown belt and short black shorts. He wears black cuffs on his forearms, matching socks that reach up to a few inches below his knees, and black boots with heels that he leaves unzipped halfway.

He often takes the image of Kimizuki's younger sister, Mirai, while battling him for control.

  • Anime: In the anime, his horns are dark blue and his earring orb, belt, cuffs, and boots are purple.

Personality

As a possession-type demon, Kiseki-o is particularly proud and nasty, and he is utterly unwilling to surrender to the weak. He uses the memories of Kimizuki's sister against him to break his will.

Unlike Yūichirō Hyakuya and Asuramaru, Kimizuki must assert his dominance through violence. Despite the way he acts, Kiseki-o claims to like Kimizuki.

History

Kiseki-o is a demon who was sealed within Cursed Gear in the form of twin swords connected by chains.

Story

Second Shibuya High Arc

Although Kiseki-o does not actually appear, Kimizuki forges a contract with him in chapter 6 and does so faster than Yūichirō and Asuramaru.

Post-Shinjuku Arc

In chapter 21, Kimizuki advances his training with Kiseki-o, and they battle for over 30 hours. Shihō screams and shakes as they fight within his mind. Shinoa warns her squad to be prepared to eliminate Kimizuki if he loses control.

Episode 14 - Screenshot 168

Kiseki-o gaining the first strike

In Kimizuki's mind, he struggles against Kiseki-o, who taunts and then stabs him, catching Kimizuki's blood in his mouth. He insists that Kimizuki's body is already his and bites him, commanding him to break and sending him into his illusion. Kimizuki relives his past of four years ago when he was eleven years old. Mirai says to leave her behind, and Kimizuki realizes this is an illusion once again. Kiseki-o corrects him, saying that these are his true memories and insisting that he wanted to abandon his sister.

Three other kids around Kimizuki's age come to his apartment door and say it's time to move. They try to convince him to kill Mirai, who is an invalid and is always holding them back. They say she told him she wanted this. When he refuses to, they say they will do it for him. He breaks free and locks them outside of the apartment. Mirai insists on Kimizuki killing her, and Kimizuki keeps telling her to shut up. The demon reveals his deepest desires, insisting he resents taking care of Mirai and wondering why this all happened to him.

Episode 14 - Screenshot 217

Kimizuki approaches Mirai and begins chatting about Yu. He says Yu wants to rescue his family no matter what, even though they aren't blood related. Kimizuki says that if the only solution is to kill his sister, then he will choose death. He insists he will never do what the demon says and stabs himself to break free.

Recovered from the psychic wounds, he charges at Kiseki-o and cuts him. Kiseki-o says there is still darkness in Kimizuki enough to betray his friends if it meant saving his sister. Kimizuki insists there is no one without darkness in this world, and Kiseki-o smiles. He says he likes humans and Kimizuki and decides to lend Kimizuki his power.

Forms and Abilities

Kiseki-o's Box
  • Demon's Thrall: Kiseki-o can enter his host's dreams and memories to create nightmares and break his host's will. This is done in order to take over his body. This ability can only be used against his host.
  • Basic Form: Connected with a pair of twin swords are Kiseki-o's most basic form. He gives his bearer great strength and power. By calling his name, he gives his bearer even greater power. A melee-type weapon.
  • The Devil's Coffin: Kiseki-o's special ability involves manifesting and opening the devil's coffin on the count of nine. Anyone who hears the counting at a close distance will be forcefully captured into the devil's coffin upon reaching nine. Yū claims to get very bad vibes from it and believes it to be something really nasty. This type of ability should be impossible for a possession-type demon.

Trivia

  • In Japan, characters like Kiseki-o are considered to be masculine on facial appearance, as a common Japanese myth and element is that young-male demons are baby-faced which would appear rather effeminate elsewhere.

Quotes

  • "La la. La de dah de dah. Well now, Shihō Kimizuki. Would you like to give up?"--Kiseki-o to Kimizuki, Chapter 21, "Kiseki-o's Box"
  • "I do not submit to the weak."--Kiseki-o to Shihō Kimizuki, Chapter 21, "Kiseki-o's Box"
  • "This is the end, Human. Relive your past. See your inner darkness. Look at your deepest, ugliest desires. Let 'Shihō Kimizuki' break."--Kiseki-o to Kimizuki, Chapter 21, "Kiseki-o's Box"
  • "There, see? For a moment, you wished you could end it all. You were sick of it. You wondered why all this had to happen to you. You were only a child, after all. It was hard. You were scared. You wanted someone to save you. You wanted to run away from it all, forever. If only you had actually killed your sister... If only you had rid yourself of that burden... Wouldn't it have been better? Yes... That's exactly what you thought, isn't it? It is over, Shihō Kimizuki. You failed at life that day, when you made the decision you did. There's no need to be stubborn. Take the easy path. It's simple. Just take that knife and do what you should have done then. Come on. Put your sister out of her misery."--Kiseki-o to Kimizuki, Chapter 21, "Kiseki-o's Box"
  • "...Ah well. There is no rush. After all, there is still darkness inside of you. Darkness so deep you wouldn't hesitate to betray your friends if it meant saving your sister."--Kiseki-o to Kimizuki, Chapter 21, "Kiseki-o's Box"
  • "Yes... That's right. That's why I like humans. And I like you too. I guess I could lend you my power. You are ugly, young and naïve... but you may call upon me to possess you."--Kiseki-o to Kimizuki, Chapter 21, "Kiseki-o's Box"
  • "Our prey is caught! Now, kill it! KILL! KILL! KILL! KILL! KILL! KILL! KILL! KILL!"--Kiseki-o to Kimizuki after capturing Yu in his coffin, Chapter 34, "Asura's Power"

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