So what you’re saying here, is the presence of a gas mask in a certain mysterious blighter’s room is a key to the overall truth of the situation?
Too bad we don’t get a lot of context from this kind of comment, then. Literally all Shuichi has to say regarding this is that it’s ‘unsettling’, which prompts no real context never mind suggest any purpose (you could say he doesn’t have the time to stick around and deduce things, but the judgement still is what it is).
The significance? Nagito was protected from the gas of a poisonous fluid. Gas masks are meant for dangerous stuff like that, as well as smoke, viruses...
And if we’re talking context... didn’t this game talk about an airborne virus?
At least, presence of gas masks would give credence to its truth, as a threat...
