Casan is a Sangheili Zealot, an Elite solider who takes on high risk missions and artifact retrieval. Casan found the Zovami brothers when they were trying to break into his home on sangheilios. Impressed that they were able to break into his fortified house while showing no signs of fear, he instead took them both as his apprentices and trained them to become both better warriors and better individuals. He acts as both their teacher and father, and lovelying treats them like sons. Casan was never able to have children, due to fertility reasons. He has always longed for something more than fighting, and the brothers were the opportunity he sought. But now, he longs more than just war. He questions whether the war they fight with humans is just and whether the prophets word holds any value. He makes a discovery and finds a forerunner monitor that tells him the truth behind the forerunners and shatters his perception of the great journey. He makes contact with a human ODST and flees to a UNSC base. 

Casan in a deep calimng tone. He is always calm and confident, acting like the word of wisdom and cares deeply for his step sons.