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Gekkōin 「月光韻, Moonlight Rhyme」 is a high-ranked manifestation-type demon of the Black Demon Series. He formed a contract with Yoichi Saotome and became his Cursed Gear.

Appearance

Gekkōin manifests as a black and green, intangible and amorphous flame-like bird demon.

In Yoichi's mind, Gekkōin often appears as Yoichi's deceased older sister, Tomoe.

While Gekkōin is possessing Yoichi, his body sprouts two short horns on top of his head, develops fangs, sharp nails, and has abnormal eyes.

In chapter 51, Gekkōin's real form is revealed. He appears as a well-built, young man with tousled light hair and a pair of curved horns sprouting from his head. His pointed ears and fangs reveals that he was once a vampire. He wears a long, black coat that has the front open to reveal his body, along with matching pants and boots. On his left arm, he dons a sort of spaulder that reaches down midway of his arm. Additionally, he also wears black, finger-less gloves. The left side of his face is covered with a black, curse-like mark.

Personality

Gekkōin hates weak-willed individuals and initially couldn't stand the pure Yoichi. Later on, they apparently become friends, as Yoichi states they chat in his dreams.

History

Gekkōin's past is unknown, but based on the pointed ears and fangs, he was once a vampire before somehow becoming a demon. At some point, he was then sealed and cursed within a bow, and became part of the Black Demon Series.

Story

Second Shibuya High Arc

Episode 6 - Screenshot 90

Posessing Yoichi

When Yoichi attempts to make a contract with Gekkōin, Gekkōin takes over, and forces Yoichi to relive his sister's death on repeat. Gekkōin then breaks the illusion and complains about Yoichi's lack of greed or desire. Claiming that Yoichi is unfit to be his master, Gekkōin possesses Yoichi's body.

Gekkōin fights against Guren, Shinoa, Kimizuki, and Yūichirō. Guren orders the two boys to kill Yoichi, but Guren eventually manages to catch Yoichi's attention. Yoichi breaks free of the illusion and says he wants the power to keep his friends safe, thus recovering the control over his body.

Post-Shinjuku Arc

In Chapter 19, Yoichi manifests his demon and eliminates three horsemen at once. He has such a high aptitude for controlling cursed gear that he did this on his own without any training or coaching. This is normally impossible.

He reveals that he and Gekkōin chat in his dreams and even talk about their favorite colors.

Episode 19 - Screenshot 36

Flying at Crowley

Nagoya Arc

At Nagoya City Hall, Shinya and Yoichi prepare to snipe at Thirteenth Progenitor Crowley Eusford. Yoichi fires Gekkōin at him but Crowley catches the manifested Gekkōin with his hands. Unharmed, he then flings it aside.

Osaka Arc

Gekkōin reappears in chapter 51 in Yoichi's mind. Gekkōin reminds Yoichi of his sister’s death and asks him why he is not getting angry. Yoichi tells him to stop and to make the illusion go away. Gekkōin refuses, stating that Yoichi will forget about his revenge if he does that. Yoichi says he is not running away and points out that even Gekkōin cannot handle all of the high-ranking vampires.

When Gekkōin says he will get help from Yoichi’s buddies, Yoichi says he refuses to get them mixed up in his revenge. Gekkouin says Yu is using Yoichi for his problems and is taking advantage of them to get his family back, but Yoichi says that is completely different. He explains that Yu is a nice person who refuses to give up and keeps trying to get his family back and to protect his friends. He says that is truly amazing and insists that despair and hopelessness would have devoured him if he had not been lucky enough to become part of his family.

Gekkōin points out that Yoichi is implying he is not nice like Yu, and Yoichi agrees. He says he is so mean and nasty and petty that he cannot let the others find out. He explains to Gekkōin that they must make Lacus suffer and cannot kill him quickly or cleanly, but they cannot let his friends know. Gekkōin laughs and agrees to help him.

Forms and Abilities

  • Demon's Thrall: Gekkōin may consume Yoichi with illusions in order to break his will and take over his body. This ability may only be used against the demon's host.
  • Basic Form: A big, black bow with a glowing eye-like parts at the upper and lower curves of the bow. It is a purely long-range Cursed Gear.
  • Miniature Form: A compact form of the weapon. It is easier to carry and to hide. A special ability of manifestation-type weapons.
  • Arrow Manifestation and Sniping Capabilities: It can manifest multiple arrows and can see far away. This allows Yoichi to target multiple enemies as well as spot them before they can attack.

Trivia

  • In the rough draft for Chapter 51, Gekkōin's real form was originally supposed to have long hair rather than short hair.

Quotes: Vampire Reign

  • "Hmm... Dangerous humans. I'd better kill them all."--Gekkōin after possessing Yoichi, Chapter 6, "Black Asura"
  • "Well? What now? Do you want power? I rifled through your heart, but I couldn't find any truly strong desire for revenge. All I found was stability. Kindness. Concern for others. I can't stand any of that. My sustenance is greed and desire."--Gekkōin to Yoichi Saotome, Chapter 7, "New Family"
  • "Lies. You were saved... and that makes you glad. You don't like fighting. You hate the thought of friends or family dying. And you can't stand the thought of killing anything yourself. You want revenge, but you can't kill? C'mon. You don't have nearly enough greed. Wishy-washy humans like you... I hate. So I think I will become you and get revenge for your sister in your place. Give me your body, Human. You don't even have a strong enough desire to resist. No, you will not do at all. You are not fit to be my master."--Gekkōin to Yoichi Saotome, Chapter 7, "New Family"
  • "Your sister was killed. Remember? Killed in cold blood by that Lacus vampire. He's standing right there, and you still aren't getting mad? Wuss."--Gekkōin to Yoichi Saotome, Chapter 51, "Crucifying the Immortal"
  • "Really. Then, let me take over your body. I'll kill that blood-sucker for you. I'll kill him good."--Gekkōin to Yoichi Saotome, Chapter 51, "Crucifying the Immortal"
  • "Yeah, but that Yu guy is totally using you for his problems, y'know. He seems a-ok with taking advantage of you guys to get his family back. Turn-about is fair play."--Gekkōin to Yoichi Saotome, Chapter 51, "Crucifying the Immortal"
  • "Uh-huh. So you're implying you aren't nice like him?"--Gekkōin to Yoichi Saotome, Chapter 51, "Crucifying the Immortal"
  • "You got it. See? This is why I like you, Yoichi."--Gekkōin to Yoichi Saotome after he reveals his intention to torture Lacus, Chapter 51, "Crucifying the Immortal"

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