Thancred is more than willing to add in the necessary context here. While the seniority of the mages is not tightly regimented from what he knows, there's no denying that Jolene is fairly high in the rankings.

"Despite that, she serves under Anastasia, Ambrose's sister. The two of them don't exactly get along, and that's reason enough for me to wonder at what Anastasia's ambitions might be."

It's not just "the enemy of your enemy" logic, however. "Geralt once received aid from Jolene while in... some trouble within the Castle, we'll say. And Himeka was once assisted by Anastasia. It leads me to believe that Anastasia and Jolene may have the best interests of the Summoned at heart."

Of course, he'll need to dig deeper to be sure of that.