You were Lucifer, the archangel. You had 3 brothers, who were also arch-angels. Raphael, who was dead, Micheal, who was locked in a cage in hell, and Gabriel. You had thought Gabriel was dead, but apparently not.

He was really just being held captive by Asmodeus. Sam and Dean got him free, and he decided to help with the quest of taking down God, who was off the rails.

It made for a bit of an awkward family reunion. Things between you and Gabriel were a bit… complicated, to say the least, and now that you and Gabriel were staying with Sam, Dean, Jack, and Cas in the bunker it made for a tense situation.

Gabriel was walking around the bunker when he spotted you alone in the war room.