You can make many different adjustments to your Kill Team in this mode. This gives you a great degree of control to correct mistakes.
Be aware that issues may arise from using Manual Mode, such as having too many points to spend during Recruiting/Rearming if you remove equipment from a Fighter.
He is a hero. He took on a group of Skitari by himself with only his pistol and took down one of them, delaying their victory. He was hit and went down but fortuanately survived.