I don't think Minori is wavering at all. She's worried and shocked people hold so dim view of Shiroe. That's naturally all Shiroe's own fault, although he might not have ever thought about it (he knows he's not overly social, but he might not have realised in his new position it could become a problem). Who knows, Minori might have realised it. Perhaps she would like Shiroe to become a bit more sociable so that folks wouldn't consider him such a gray eminence.
Looks like his guild is slowly growing, whether he wanted or not.
Where did she get her info from, though? Do they have some kind of clairvoyance skill? My thought was that she was from the other adventurer city they mentioned, where the other spell was detected, and might indeed be working together with Regan. Perhaps they (there might be more than these two) have some plans for adventurers and world class spells.