Angels
The Metatron was a scribe, a messenger, and about as far from a warrior as one could get. But that didn't mean that he couldn't handle himself in a situation like this. He had been a holy warrior when it had called for it back in the genesis, and in order to make sure that they got Her back and whole, he was going to place himself in that position again.
But he was more than willing to take up the defensive position. Castiel and Eve were the experience warriors. Bartleby and he were the support. He never in his life thought that he would be working with Bartleby again, not after his banishment, but desperate times call for desperate measures. Infighting wasn't beneficial when they had an outside force to combat.
"Lead the way," Metatron said to Castiel as he felt the reconnection that had been muffled and lost since She had vanished. This ended here.