Danton Hyleg was a mobile suit test pilot in charge of data collection in the Principality of Zeon and Neo Zeon. Although an exceptional pilot, he remained a test pilot, and was never deployed in combat due to being unwilling to take a life.
After the end of the Second Neo Zeon War, he hid his identity and moved to Side 6 with Arlette Almage.
(Source: Gundam Wiki)
