Klaus didn't object when his mother suggested that Hanna demonstrate what she had learned rather than just describing it like the others.
His mother rarely showed interest in his cultivation, except to ensure his happiness, so seeing her enthusiastic about something related to cultivation made Klaus eager to see what it was.
Like Kay, Hanna was also an archer, but with the lightning element. She hadn't been the best and brightest like Lily and the others when she first awakened as a warrior, she was only average.
With a single passive healing ability and no active skills, Hanna had to rely solely on her class and talent to master her archery skills. She was ordinary at best.
But everything changed when she met Klaus. She started training harder, and although she hadn't awakened any new skills or techniques, she was thriving with the class and talent she had originally awakened.