When Renaud was blocking Wolfe's attack, it gave Juin an opportunity to send a small flicker of his Soul Fireball into Renaud's body. It was too small to give Renaud much pain, but it would serve as a reminder to the young man that his body had been invaded by a foreign power and that he should be more vigilant.
Juin wanted to stress Renaud out. The more stressed out he was, the more likely it would be for him to make a mistake.
"Good job!" Juin praised Wolfe as they both looked at the man floating in midair.
"They are stronger than I thought…" Renaud murmured to himself. He glanced over to where his father was sitting, and a determined look soon appeared over his face. "I have to end this quickly…"
Ignoring the sharp pain in the back of his shoulder, he raised his weapon high. The branch-like markings on the back of his neck pulsed crazily in red, almost as if they were a reflection of his emotions at the moment.
…
