La Blue Girl

The story involves various ninja clans in a constant state of war with one another. The female protagonist is Miko Mido, a young ninja-in-training and the next leader of the Miroku ninja clan. This clan has control over the Shikima, a perverted race of sex-hungry demons led by Miko's father, the Shikima Lord. However, when thieves steal the magic compact that grants the clan this power, Miko has to fight the Shikima, utilizing her "sexcraft" ninjutsu in order to save the world. The Shikima live in a parallel dimension called the Shikima Realm, and one must perform specific sexual rituals in order to travel there.

Miko Midō (美童 巫女, Midō Miko)

Voiced by: Omi Minami

Miko is the heroine of all La Blue Girl OVAs and a kunoichi. She is the last descendant of the Miroku kunoichi clan, which has been feuding with the Suzuka clan for many generations. She is often very annoyed at being a sex ninja and having to use her body as a weapon against opponents. Miko can use many unusual sexual techniques, such as hardening her pubic hair into needles and firing them at an opponent, or the 'Nyoninboh' technique which allows her to swell her clitoris to the size of a man's penis and use it to arouse the passions of her female rivals. If strands of her hair are torn out, she can use them as acupuncture needles to stimulate her opponent's erotic pleasure points. Her most powerful attack is the 'Aoi Tatsumaki' (Blue Whirlwind), in which her hair turns into a giant blue tornado that invariably rips away all of her clothing (although most of her clothing is invariably in tatters by the time she employs this climactic tactic anyway). Miko is the daughter of Seikima, the King of the Shikima, and of Maria, the Queen, who is human and a former Miroku woman. As such, Miko is a demon-half-breed and has the blue-colored blood of the Shikima, hence the title La Blue Girl.

Nin-Nin (ニン忍)

Voiced by: Kappei Yamaguchi

Nin-Nin is a dwarf ninja who is always hooded. He is Miko's loyal, yet sexually perverted, companion and sidekick. He likes to peep when Miko is bathing or masturbating and beams with joy whenever he can see her naked, barely dressed, or in any troublesome sexual encounter with demons or other ninja. On the other hand, he takes seriously to heart his role as Miko's protector and always try to help her out whenever she is in trouble, or at least whenever he is not busy taping her "exploits" for future reference.

Fubuki Kai (甲斐 吹雪, Kai Fubuki)

Voiced by: Junko Asami

A self-made ninja, Fubuki Kai sees Miko Mido as her adversary, as she wishes to prove that she is more talented than her, and more worthy of the title of headmaster of the Miroku ninja clan. After she is defeated by Miko in a sexual duel, however, she is adopted by the Shikima and becomes a friend of Miko. When adopted by the Shikima, she metamorphoses into a Shikima, since she desired enough power to equal Miko Mido. She is fond of her new form, but also irritates Miko by being better than her.

Yaku (夜久)

Voiced by: Mai Asakura, Miho Yoshida

Yaku is another ninja of the Miroku clan, whom Miko meets when she decides to travel to the secret Miroku village. She is the only survivor (with Miko) of the Miroku massacre caused by Kamiri and Kugutsumen. Yaku is a powerful—and potentially very threatening—girl, for she shapeshifts into a werewolf unless she reaches an orgasm in time. Her most notable other attributes are her large breasts, of which Miko is envious.

Kamiri

Voiced by: Yumi Takada

Kamiri was at one time the Miroku clan's sexcraft instructor, but she was banished by the clan for treachery because she became the lover of the renegade ninja Kugutsumen. Before being driven away, she was also punished by being raped with a thorny phallus that mangled her vagina. As a result, she swore to take vengeance on the Miroku clan. When Kamiri returns and steals the Miroku treasure, the magical sword Jipang, its evil spirit possesses her and makes her want to conquer the Shikima Realm, kill King Seikima, and rule over it. For that she needs Miko, who is the only one who knows how to get there. After several fights between Kamiri, Miko and Yaku, Kamiri is destroyed by the evil spirit of Jipang.

Kugutsumen

Voiced by: Issei Futamata

A renegade ninja of the Suzuka clan who became the lover of Kamiri, the Miroku sexcraft instructor, after he was able to take control of her when a drop of his semen entered her body during a fight. It was he who killed all the Miroku ninja by mangling their vaginas and causing fatal hemorrhages, mimicking their punishment of his lover. Because of her wounds and her possession by Jipang's evil spirit, Kamiri refuses to have sex with him and so he rapes several young girls. He is a tough opponent for Miko and Yaku, for he often tricks them by disguising himself and so lures them into his traps.

Various Shikima and tentacled monsters

The monsters, who generally have irregular and grotesque shapes, try to make the women reach orgasm, to kill the women, or both, depending on the monsters' various agendas and natures (one poltergeist is depicted in the manga as merging with a kappa in order to heal himself after being defeated by Miko and Nin-Nin and thus get revenge against Miko; the Shikima King is said to be Miko's father, but a Shikima curse leads to her being violated anyhow, as two examples).

Miyu Mido (美童 美夕, Midō Miyu)

Voiced by: Misei Asaoka, Takako Honda

An older sister of Miko and a drama actress, she was kidnapped by the demons from the Shikima World and was rescued by her sister. It is revealed that Miyu was not born of a Shikima but of a human, born through the joining of a member of the Suzuka clan; this disqualified Maria of holding the title of chief of the Miroku clan and, thus, she was driven away, while Miko was given to her grandmother for a proper raising and training.

Kanako (香菜子)

Introduced in the third episode of La Blue Girl Returns, Kanako is a student at a nursing college. Before her grandmother died, she had trained Kanako in the carnal arts in order to offer her services to Miko Mido and the Miroku clan. It then became her dream to be summoned by Miko, and she developed a crush on her. She got in touch with the other main characters through a website posted by Fubuki in their search for more members of the Miroku clan.

Kochō (胡蝶)

The leader of the Mahoroba clan.

Rokuga

Another member of the Mahoroba clan. Posing as Miyu's new boyfriend, he succeeds in stealing the Shikima seal case.

Ruri (瑠璃)

Miko's classmate.

Maho (真帆)

Ruri's brother, introduced in the third episode. It is love at first sight between him and Miko, but she continually dreams of him wearing a strange outfit, a hint that they were lovers in the past.

• Injū Gakuen: Shikima-kai no gyakushū (Revenge of the Sex Demon King) (1994)
• Injū Gakuen 2: Mashō no hime tanjō jissha-hen (Birth of the Demon Child) (1996)
• Injū Gakuen 3: Kunoichi-gari (Lady Ninja) (1996)

• La Blue Girl, Toshio Maeda's manga of six volumes.
• La Blue Girl, a U.S. comic book by Matt Lunsford and José Calderon. It has the distinction of retelling the two distinctly separate story arcs of the first four episodes of the first anime series by merging them together, albeit with story changes to the plots of episodes 2 to 4. Whereas Toshio Maeda's manga established him to be a young Shikima demon able to transform into an adult form, the U.S. series reveals that he is a product of his human mother's rape by a Shikima, that she died giving birth to him, and that his dual heritage resulted in his deformed face, which is shown unmasked.
• The Graffiti book, a compilation of screenshots from episodes 1 to 4.
• The In no Shou and You no Shou art books contain screenshots and illustrations from La Blue Girl and Lady Blue.
• The Art Book of Injuu Gakuen / Youjuu Kyoushitu contains CG illustrations from the PC98 game.
• Rin Shin's art book contains illustrations used for the promotion of the series.
• A novelization of the OVA series (two volumes for episodes 1–5, and two volumes for the EX series) features a completely different plot, different characters (most notably the Ranmaru-Bosatsu duo) and a more sexualized and violent tone than the original.

• La Blue Girl for NEC PC-9801 and FM-Towns, featuring a different character design from the manga and the anime. The story is an adaptation of both the first volume of the manga and OVA: Miko's friends at school are assaulted by demons and her professor is kidnapped and sent to their infernal dimension; Miko travels there and saves her; everyone goes back to Earth, where a final showdown is awaiting Miko at school. Gameplay-wise, it is a "digital comics" adventure game with some shooting phases (in a Snatcher fashion, and with shuriken instead of a pistol).
• La Blue Girl for Windows 95. The art is more faithful to the anime character design, while the story is an adaptation of the La Blue Girl EX OVA.

• Toshio Maeda official website (contains the original La Blue Girl manga, as well as all of Maeda's other works)
• La Blue Girl at IMDb
• La Blue Girl (OVA) at Anime News Network's encyclopedia