Katharina observed Vergil's gaze with a playful smile, eager to see what he could show her. She wasn't the best with observational techniques, but she sensed that he had latent potential that could be awakened somehow.
"Then, let's get started," Katharina said, adjusting her posture. Although she still appeared quite seductive, she approached Vergil again. "First, we need to work on your control of Demonic Energy. This is crucial for enhancing your abilities and making your power more efficient."
Vergil nodded, his eyes fixed on Katharina's face as he tried to manage his excitement and anxiety.
"To begin," Katharina said, raising one hand and creating a small sphere of Demonic Energy in her palm, "you need to understand the essence of Demonic Energy. It is the foundation of all your powers and must be manipulated with precision. How you control this energy can determine how effective you are in combat."
