The Helmacrons are a fictional race of aliens in the Animorphs universe. They are about a sixteenth of an inch tall with humanoid bodies with another set of legs. Their heads are perfectly flat on top, with large green eyes sitting on them. Their faces come down from the top in an inverted pyramid to a hooked, barbed chin. Their mouthparts are insectlike, with gnashing sideways teeth. They dress in silver colored one-piece suits with turquoise collars.

Helmacron Society

Female Helmacrons are dominant to male Helmacrons, holding the important military positions on a spaceship, while male Helmacrons have janitorial or guard jobs. The Helmacrons kill their leaders before promoting them to make sure the captain will never make an error in judgement. (Spoiler Warning): Helmcrons have the unusual mental ability to transfer their minds to another when their bodies are destroyed. Therefore, you can never really "kill" a Helmacron mind, since it dwells within other Helmacrons. Despite this, the Helmacrons seem to be no wiser than if they had one, or even no minds at all; despite their tiny size and relative weakness, they have inflated personalities, and of all the Animorph races, seem to the least mentally stable.

Technology

The Helmacron spaceship Galaxy Blaster is shaped like a baton, with three clusters of three long tubes at the far end and a fierce death's-head bridge at the front. It resembles a Romulan Warbird from the television series, Star Trek.