Before, Yan Fei was still concerned about protecting his true identity, not wanting others to associate him with the Destroyer. However, after becoming a God-Level Expert, his viewpoint slowly changed. Even if his identity as the Destroyer was discovered, it was no longer a big deal because he now had the ability to protect himself. A God-Level Expert paired with a highly powerful Drone was enough to decide many things.
So when Yan Fei's true face was recognized by Yoshimasa Abe's fox-like pupils, he wasn't panicked. Instead, he thought of a key question and asked, "Yoshimasa Abe, since you possess the Eye of Truth that can see through all deceptions, then you must know what the Lieutenant Colonel looks like. How is it that you still can't recognize the Lieutenant Colonel's true appearance?"
