When Durin came out of the washroom and returned to the first floor, Irene and Alice were still discussing today's short film about Durin. They didn't hear the gunshot from 789 meters away—indeed, it would have been impossible for them to hear it, as Durin's rifle was fitted with a silencer marked with a Silence Magic Array. Compared to ordinary silencers, it was more effective and had incomparably better durability.
Even with subsonic ammunition, an ordinary silencer couldn't achieve complete silence, but a silencer etched with a Silence Magic Array could do just that—apart from the whistling tear of the bullet flying through the air, the sonic boom from the muzzle would be entirely devoured by the Array.
Therefore, when Durin went downstairs, the two girls happily followed him to the main hall.