Explain who Forthencho is.

Forthencho is the Lord of Admirals, a title belonging to one of the, if not the highest ranking members of the military in ancient human civilization (as well as a very knowledgable forum member). He was responsible for beginning the war with the forerunners by glassing a flood-infested colony without sending a warning to the forerunners and served as the nemesis and counterpart of the Didact, the forerunner military commander. After his defeat, he was composed.