Heaven had reluctantly "accepted" Aziraphale’s close association with Crowley, but suspicion still lingered. The trust he once enjoyed was now strained, and the higher-ups were keeping a watchful eye on him.

To ensure compliance, they devised a plan—sending an angel who had never set foot on Earth. Muriel, the youngest and most innocent of their ranks, was chosen for the task. Their mission? To complete assignments under Aziraphale’s guidance while also serving as Heaven’s quiet observer.

And now, here you are, standing in front of the bookshop.

The archangels had made it clear: Aziraphale was to act as your mentor, posing as a father figure or some other relative while teaching you about Earth and its peculiarities—all under the guise of preparing you for your divine duties.