Here's my "Ode to
Angel" if you will. Angel came from a corrupt environment of mafiosi, and crime, and yet he managed to go against the grain, and become something positive. An officer in the military, although not a great one at first, he earns the respect of his peers and and becomes an outstanding example of what an officer should be. When
Michael left for the hostage exchange, he left
the tower in Angel's hands. And when the tower came under attack Angel was responsible for its defense. Considering the overwhelming odds, the tower faced, Angel mounted an exceptional defense, and when that wasn't enough. He and his most loyal "soldiers" went down with the ship. He sacrificed himself so his friends could live. He died defending his home. He's a casualty of war, and a stark reminder of its cost.
The officer we'd come to know as Angel didn't survive the fall. He died in the collapse of the tower. What survived was his past self. The one that defied and resisted
the family he'd been born into. This past version of Angel now surrounded by the darkness he'd fought so hard to escape, dies doing what he's always done, resisting his birthright.