I mean not the divine shield having a simple "i head that name" reaction but the context in which she heard the name from her father
Sure you can say there's no evidence here to Noor being a mythical hero and that maybe he was just referring to his raw determination or something, but the point is that Noor made a impression on the masters, they let that one particular mystery cook since chapter 7, chapter 2 if you count her initial reaction to his name, and considering this manga has a tedency of telling events from two different points of view it makes perfect sense for us to know the story of Noor's training through his point of view first and then from the masters later