Vex & Aziraphale
Vex would be more than happy to be Aziraphale's friend. And he was glad to know that the angel wasn't really looking for any kind of relationship, because that took a lot of the stress and pressure away. Because friends he could do. Sex, he could do. But relationships? Not so much.
"Tell me more about your world," he suggested. "You mentioned angels and demons. ...are you an angel or a demon?" he asked. "You look like you'd be more of an angel, but I am just guessing."
Then his eyes widened slightly, and he smirked. "That wasn't me trying to hit on you, by the way. That's not what friends do, right?"