The Child (Aeon's)

The Child was a Gaian alien, and the titular character of the story Aeon's Child.

History
The Child's "Mother", Aeon, was a Gaian world who was being destroyed by its other child, a nearby planet that it had transformed into another Gaian world. The Child had Aeon's memories and nature. It was launched into space in an organic starship and made it to the Great Ship, where it tried to disguise itself as a human. After an interrogation by Pamir, it revealed itself to be a Gaian, and offered to improve the ship's water systems. Pamir secretly accepted this offer, hiding the creature inside a water treatment facility while faking its eviction from the Ship.

In its new hiding place, the Child was able to purify the Ship's water better than the machinery that it replaced. It grew to massive sizes, and could entertain Pamir by transforming forming multiple bodies and environments. In addition to Pamir, the Child befriended or manipulated other people on board the Ship, acquiring supplies in secret.

When Samara arrived to kill the Child, Pamir tried to help fight it off. In the end, Pamir blasted both creatures with a plasma weapon, and combined what remained of their flesh with his own, creating a new Child.