Emily's talent was indeed powerful, and she possessed the determination to practice diligently. Liszt had no reason to stop her—knights recover quickly as long as they are well-nourished, and don't face the risk of overtraining and crippling themselves like ordinary people do.
If she could really make a breakthrough to become a Sky Knight.
Then he would have the only female Sky Knight follower in the Duchy of Sapphire, which was a rather exhilarating honor. Moreover, her entire career was sponsored by Liszt, meaning she belonged wholly to Liszt. Even if she became ennobled in the future, she would still be a noble of the type found in the Blue Blood Alliance.
The Blue Blood Alliance was a "private military force" of knight order belonging to the Sapphire Family.