Roselyn was practicing with John, in order to get stronger and get control over her wings.
The news of her transformation into a true fairy had been spread in all Kratez. That news scared all the supernatural creatures because it was the prof she was very powerful, nonetheless, everyone was too scared to attack her so John wasn't very concerned about it.
He knew power and strength came together with fear and the more powerful you became, the more people would fear you or envy you.
Roselyn narrowed her eyes and focused, John suggested she stand on her tiptoe so that she could fully focus on holding her body weight and keep her balance.
John told her the first thing she had to do was to get used to her turned body, the weight of the wings, and try to link to them. Only when she knew exactly how they looked like, how they felt on her shoulders, and how huge they were she could finally attempt to move them.