That answer introduces a new variable she hadn't considered, bringing her assessment to a halt. She turns it over. Etheirys is hardly the only world in all of the vastness of the universe, and they'd hardly had all the knowledge in it, even before the Final Days. (If they had, would there even be reflections and a Source? A Hydaelyn? Could she have—)

"Not reflections but iterations...?" That would make sense for why Eula, by individual, lived on one and fell on another, and why the name is unfamiliar and not among the Scions she knows. Hm! Wisteria's... quick to accept it. For now, at least. It serves its purpose as a working theory (and if it's a lie...).

"That does inspire a number of questions." Wisteria's arms fold again, notably less tight. "Including as regards our reflections in these mirrors rather than Hydaelyn's." She nods to Eula's more—to her—familiar reflection. "Had one in poorly-chosen robes, myself."