Aiwass felt that if he hadn't shown his affinity with the Unicorn, Grey would probably have intended to let the Pegasus carry him.
As the spokesperson for the Pope, her popularity within the Eternal Theocracy was obviously very high... probably even higher than Aiwass's popularity in Avalon. Escorting Aiwass around the Ring, one level after another, would only serve to make a name for Aiwass. And she could sense that Aiwass was not the kind of person who enjoyed fame.
This was probably why she had brought along no fewer than three groups of Papal Guards. On one hand, "seven" was the holy number of the Silver-Crowned Dragon; on the other hand, it was essentially having these Papal Guards act as drivers for Aiwass and his companions.