A military corporation affiliated with the UPIG. They tend to hide in the shadows of other companies, but provide well-built, all-purpose, balanced weaponry; they are also known for their extreme quality-over-quantity philosophy when it came to their products. Their weapon designs are quite unique, and their name is well known across the world. Of all the corporations, Helios ST is only known to play major roles during the Maelstrom War and the Seperation War.
Recently, the company has started funding and sponsoring a private security force known as D.A.R.T.