He deliberately exhibited an attitude that suggested he hadn't recognized the other party as "Claw Mark," speaking as if he was a common government official completely unaware of the insider information. A ordinary official would undoubtedly treat the other party as a genuine Magical Girl, and being polite with a hint of respect was the most appropriate demeanor.
The authenticity of the other party's conversation under surveillance was difficult to discern, and he didn't know if they were also engaging in disguise and deception. Thus, it was best to play along superficially while concealing his own true thoughts, and slowly test the waters.
After listening to what he had said, the girl and the fairy in front of him paused for several seconds before they started to speak as well.
"Ah, yes, right, we are from the Magic Kingdom, and your Abnormal Strategy Bureau has no authority to detain us, let us go quickly!"