Alch 'Aedalee was an elite in the Sangheili super soldier program. He was one of The few elites in the Sangheili super soldier program, who managed to pass the performance test, and got to wear and elite combat harness 2.0. He got put into the Security Elite, were he would eventually get promoted to Commander. He was then assigned as Commander For the E'Sco Legion which protects and serves under Supreme Commander Eaite 'Oodatee, who was a fellow Sangheili super soldier. Alch 'Aedalee was very by the book, he was often wanting to do his job well. He would often escort Eaite through a mission even though he was told other wise. Though sometimes Eaite managed to talk Alch 'Aedalee out of escorting him on some missions.