Neutral

Neutrals are Transformers who have renounced the idea of factions or refused to take part in the Civil War. While some Neutrals resist joining a faction by choice, some defining themselves not by faction but by world, as the war drags on the majority are those who are unsuited to combat such as the Empties.

While Neutral is what the Autobots call them, the Decepticons prefer to call them "target practice".

Ficiton

Marvel Comics continuity

Generation 1

(Events from the UK-only comics are in italics.)

The Neutralist town of Yuss in the Stanix region was a frequent target for relieving the boredom of Decepticons stationed in the area The Magnificent Six!

Dreamwave continuity

During the evacuation of Altihex, twenty to thirty Neutrals took control of a building, arguing for both Autobots and Decepticons to end the War, renounce their allegiances, and unite. Skywarp took a moment to consider whether or not to take advantage of their idealism...then decided to slag them. The War Within, Part 1

From Teletraan I: The Transformers Wiki, a Wikia wiki.