|Johnnie, these are living creatures.|
—Azuma, Battle of Klendathu
The "Extraterrestrial life form" (異星生命体 Isei Seimeitai), or "Alien life form", is a life form from outer space and is hostile to the human.
The home planet of the Extraterrestrial life form is Klendathu, a planet covered with massive protophyte jungle.
- "Base" (基地 Kichi) – A gigantic cluster of the Bug, able to spread out "bug spores".
- "Transport" - Much similar to the "base", a transport is capable of space flight and travel through the cold vacuum of space.
- "Warrior" – A bipedal polyp-like creatures possessing tentacles and integrated biological weapons capable firing beam or globules of a sticky explosive compound at high muzzle velocity.
- "Fighter craft" (戦闘機 Sentoūki) – as its name suggests, this type of alien acts like a fighter craft.
- The Extraterrestrial life form is the equivalent of Pseudo-Arachnids from the novel Starship Troopers (Arachnid in the film and Roughnecks: Starship Troopers Chronicles universe).
- The Extraterrestrial life form is able to become invisible.
- The Extraterrestrial life form is able to penetrate the wall without damaging it.
- Starship Troopers (OVA)