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Manga / Alien Nine

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Keeping E.S. #9 safe from Alien Invasions: left to right, Kasumi, Kumi and Yuri.

Alien Nine is a science fiction manga and OVA about a trio of 6th grade girls (Yuri Otani, Kasumi Tomine, and Kumi Kawamura) who are selected by their elementary school to become alien hunters. Donning special uniforms, with rollerblades and helmet-like creatures called Borgs that they wear on their heads, the girls are tasked with hunting down and capturing the marauding aliens that periodically threaten their school. What starts off as a straightforward cute action story turns disturbing rather quickly when one of them gets eaten by an alien and suspicions about the teacher running the program and the principal arise.

Alien Nine consists of:

  • The original three-volume manga that ran from 1998-1999.
  • An OVA released in 2001 that became a cult-classic.
  • A one-volume sequel manga released in 2003, Alien 9: Emulators.
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  • Alien 9 Special, a nine-page single chapter that gives a (very) little bit of gap-bridging between Emulators and Next.
  • Alien 9 Next, a self-published 2015-2016 three-chapter sequel, with experimental computer-generated art. Currently ends nonconclusively, suggesting that Tomizawa has or had plans for more.

Now has its own Character Page. Contributions are greatly encouraged and appreciated.

Compare its Spiritual Predecessor Parasyte.



  • 2D Visuals, 3D Effects: The drills. Not shabby for 2001, though.
  • Adults Are Useless: Deconstructed. The school administrators eagerly send pre-teen girls out to capture aggressive aliens, and their parents only wave them off and tell them to continue doing their duty. Cue heavy physical and psychological trauma to the girls and regretful parents. Justified in the case of the school administrators: Emulators reveals it's all part of a Masquerade.
  • Alien Blood: It's dark green.
  • Alien Invasion
  • All There in the Manual: The OVA was only four episodes long, cutting off just as things were getting interesting. The manga, however, continues the story...
  • Animated Adaptation
  • Assimilation Plot: The various alien species appear to have this in mind for humanity and manage to succeed with Kasumi and Kumi, and have already succeeded with their teacher.
  • Barbie Doll Anatomy: In the OVA.
  • Battle in the Center of the Mind: The climax of volume 3. Even after the Sunflower is physically removed from her head, Yuri still has to fight to get it out of her mind.
  • Bio Punk
  • Bizarre Alien Biology
  • Body Horror: When Kumi becomes a borg.
  • Break the Cutie: This series makes pushing all three girls to their mental/emotional/physical limits an art form. By the end, two of the three are broken: whether they seem that way or not: and the third a candidate for a Post Traumatic Stress Disorder diagnosis.
  • Brother–Sister Incest: The OVA implies that Kasumi and her big brother had this type of relationship. At the very least, Kasumi had a quiet obsession for her brother. Whether it was one-sided or not is open for debate.
  • Cloud Cuckoolander: Kasumi seems a bit like this... until we find out about her past.
  • Cosmic Deadline: The last volume of the manga has about as much plot as the previous three.
  • Dark and Troubled Past: Kasumi and Kumi have them.
  • Earn Your Happy Ending: After four volumes of trauma, Emulators ends on a relatively happy note.
  • The End of the Beginning: Played Straight and Lampshaded by the OVA's last episode, it also being the title of said episode. It hints at an interstellar conspiracy, with the heads of the Alien Party committees in each school and their principals in on it. Of course, you have to read the manga to see all this.
  • The End... Or Is It?: At the end of the original manga, Yuri makes it out, still an unfused, ordinary human. ...And then she notices in the mirror that a lock of her hair has become curly. Emulators reveals that that single drill is the extent of Yuri's transformation and she's still human. There's still the matter with the Yellow Knives, though.
  • Evil vs. Evil: Most major conflicts. The antagonists are usually a threat to the students' lives, yes, but the school's administration has taken over parts of the school system in order to propagate themselves by tricking young girls into becoming their hosts.
  • Freudian Trio:
    • Id: Kasumi Tomine (The McCoy) — Joined because she likes catching/fighting aliens. Also contrasts with Yuri in that she is a prodigy and a xenophile. Also serves as the red oni to Kumi's blue.
    • Ego: Yuri Otani (The Kirk) — Railroaded by her classmates since no one else wanted to be stuck wearing the Ugly Cute alien. The opposite of Kasumi in that she is a crybaby moeblob who despises all things alien.
    • Superego: Kumi Kawamura (The Spock) — Chose to be an Alien Fighter rather than be saddled with the higher pressure and responsiblity of Class President (little did she know...) but is also the thinker and The Stoic of the group. Also serves as the blue oni to Kasumi's red.
  • Gorn: The OVA is not afraid to show aliens getting bloodily maimed. The manga goes further, with the girls getting maimed themselves.
  • Heel–Face Revolving Door: Kasumi tries to kill Kumi during the Yellow Knife incident, is brought back to semi-normal after becoming one, kills Megumi's borg which allows her Yellow Knife spawn to eat and possibly kill the rest of the school, and tries to force Yuri into fusing with Kumi without regard for the former's life in an attempt to save Kumi in Emulators. However, it is implied that the Yellow Knife is manipulating her throughout it all.
  • "I Know You're in There Somewhere" Fight: This happens after Yuri becomes host to a Sunflower.
  • Improbable Age: Even lampshaded by one of the characters.
    Monami: Objection! We're kids. That's an adult job.
  • Japanese Ranguage: In the OVA, the girls' profiles show their "brood types" as AB.
  • Lovecraft Lite: Well, maybe "lite" isn't exactly the right word.
  • Masquerade: Ms Hisakawa is actually releasing most of the aliens they're supposed to capture because the real objective is to turn the girls into drill clan symbiotes like herself.
  • Mind Rape: Several types of symbiotes are capable of this, including Yellow Knives and Sunflowers.
  • Mind Screw: The true nature and scope of the setting is kept rather ambiguous the whole way through. The lines of identity between members of a symbiosis are also hazy.
  • No Ending: The anime abruptly ends with Yuri finding Kumi apparently dead.
  • Phallic Weapon: The Gladius aliens, notably used only by boys, use drills to penetrate things. They also look like penis heads, and their name is Latin for "sword".
  • Power Trio: Yuri, Kumi, and Kasumi.
  • Prehensile Hair: That forms into auger bits, no less. In Emulators there's a fourth alien fighter whose hair hasn't settled down and moves around on its own.
  • Prone to Tears: Yuri. Just looking at her is enough to start the waterworks!
  • Rollerblade Good: The trio use rollerblades to get around and to fight the aliens.
  • Sixth Ranger: Monami (although she's actually a Fourth Ranger).
  • Soundtrack Dissonance: The OVA likes to play "cheery" music inappropriately. Most notable is the middle of episode 3, when bubbly opening theme song playing while the girls fight a giant "centipede" while Yuri loses it.
  • Split Personality: Kasumi, after being eaten.
  • Starfish Aliens
  • Sugar-and-Ice Personality: Kumi is a Type 1.
  • This Is a Drill: Choice of weapon of the borg and gladius aliens.
  • 20 Minutes into the Future
  • Yandere: Kumi becomes an obsessive type over Yuri after Kumi fuses with her borg.


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