I have a crap ton of gripes, but the one that stands out the most is Naofumi letting those guards escape with a recording device. Even if he didn't spot one, he should capture all of them to interrogate them. There is literally no reason to let them go because Filo can easily chase and incapacitate them. All this brouhaha could've been avoided.

If the goal of the author was to have this brouhaha, he could've written it better and have the person recording the whole thing be hidden. Not like Naofumi couldn't block the soldier's attack on Melty, which came from so far away, without seeing that orb.