*UNEDITED*
Meanwhile, Setsura was amid a serious fights. Realizing the strength of her opponents Setsura switched to using her baton rather than her gun. Indeed, she managed to handle the situation just fine.
Everyone here is the same. They don't notice anything. They don't say anything. And they don't think anything. They are merely a shell of their former selves and soon they will disappear like the melting snow. This epidemic leads innocent people to their deaths, and yet, its pathogen will never be eradicated.
This is a disease called serenity - a form of death that people have wished for.
That's why, she has to take matters into her own hands. She can't rely on anyone else for that. If there is something you wish to change, then she has to take the situation in your own hands. If she doesn't then nothing will truly start.