Complex sentence: Despite the brutal nature of his work, the Operative is courteous in all his dealings, even with his intended victims, in fact the only point in which the Operative is shown losing his cool is when he witnesses the emergence of the Reaver fleet.
Split into simpler sentences: Despite the brutal nature of his work, the Operative is courteous in all his dealings, even with his intended victims. In fact, the only point in which the Operative is shown losing his cool is when he witnesses the emergence of the Reaver fleet.