All of them that I've seen so far are very thin lines that stretch into the sky. There doesn't seem to be much of a purpose in me seeing them yet... I'm assuming it's just one more mystery to unravel.

[Aziraphale gives a small nod.] Really, I enjoyed the time we spent together. Perhaps he's still technically evil, but I do think it was more a part of his job than part of his true alignment. We had lunch together quite often.