Arklight is the powerful head and CEO of the arms division of the Terra super corporation Gemini Genesis Gamma (also known as Tri G). Many have questioned the origins of him, but no one has found out, not even his employees (or as he calls them, "his loyal servants"). It is said that many people have fallen under his might and many civilizations have died under his reign of chaos and terror, although these are simply nothing but claims and nothing more.
After the ship crashed, Arklight was able to retrieve a sample of Robin's blood and use it to create Elvyron and Astralius. Unfortunately after Astralius destroyed the Tri G Battle cruiser, he was forced to reside on Terrahypt until he could create an apropriate ship to leave Terrahypt and return to Tri G HQ (or thats what others believe).
During his time on Terrahypt however, he decided to take matters into his own hand and seize control of Terrahypt using his army of Cyrathesians he created while he was in hiding, thus causing chaos and rioting across Loucreas and other major cities on Terrahypt.
Now all of the survivors of the chaos looked to Robin Jones to save Terrahypt from the tyrant emperor and stop the terror once and for all.