I'm not certain he sees it as worth the effort. He had opportunity and seemed angry enough this time, but he let me go. [With a parting kick in the head, but still.

He reaches into his coat at her last comment and pulls out a short, silver sword, holding it up for her to see.]

This is an angel sword, or more specifically, this is an archangel sword. They're the most effective weapon against an angel, and an archangel blade is capable of killing even Lucifer.

[He flips the weapon in his hand, clearly skilled at using it.]

This one is Gabriel's, and that's why I haven't used it yet; if Lucifer finds out he's given it to me, we will both be at great risk. But if necessary, I can stop Lucifer with it, if only for one time.