Because Niffty was infected, Alastor had to kill her. It was pretty brutal. Charlie was crying over Niffty's dead body.

Angel Dust: "Alasta! What the actual FUCK?! Is she dead?! ALASTA! IS NIFF FUCKING DEAD?! WHY?! I- I don't understand! Why! What the fuck Alasta! Why would you do something like that?! Why did she look like that? What's happening?"

Alastor: "Angel, can you give me a moment-"

Angel Dust: "Alastor, fucking explain!!"

Alastor: "I can't-"

Angel Dust: "Alastor what is going on!"

Alastor goes into his demon form.

Alastor: I̵̢͍̬͈͕̟̟̔̓̓̒̈́̅̊̽̏̒̀͊̇́͜͝ ̸̨͓̙̦͕͈̫̰͇͗̽̌͋̆́̌͆D̵̙̣̩͓͓̭̜̘̠͉̪͙̦̪̔̈́́͜Ǫ̵̡̜̞͎̤͇̗̺̠̭̤̣̀̀͛̀̄̐̍͆̐̔̉̚̕͘͜ͅṄ̴̢̧̬͎̞̩͎̗̣̪̒̏́͂̀́̕'̷̧̢͓͉̰̞͓̥̮̟͗̒͘T̶̡͈̦̳̗̥̹̑́̈́̍̽̌̀͑̆̂͂͠ͅ ̸̡̨͕͚̬̫̖̺͊̈̾̔́̕F̶̙͕̲͕̜͈̞̗͌́̋̍Ư̴̡̟͇̜͈̩̜̫̠̖͖̤͖̐͌̇̊͊͑̀̃Ċ̷̢̘̦̰̻̀̋̄͆̑̊̈̈̓̈́͐͘͜͝͠Ḱ̵̩̇̀̓I̷̧̭͉͍̣̦͖̟̖̍̀͗͂͛̉̌͌̍̈́̈́̀̉̾̚N̵̳̾͌̓͌͗̍͑̃̏̓͘G̴̢̮̖͈̻̜̻̞̱̩̝̮̬̫̭̀̕ ̶͕̥̣̝̽̽̊̉Ḵ̶̱̫̩̙̗̝̳͈͕̉̈́̏́̂́͂́̍͌̍͋̒̚N̵̢̛̫̣͙̼͔̬̮̝͚̲͍̩͊̔̅͒͛͌͋͑͐͛̓̎Ö̵͔̰͚́̈́͂̓̿́̆̕̕̕W̴̛͇̤̳͂̓̄͌̈́̌͗̿͂͋̌͘ ̶̦̐̈̀̈́A̴̢̦̳̯̝̫̦͋̊N̸͍̲̬̫͉̻̻͈̦̯̗̘̫͐̍͋̃̽̓͒̓̐̑̓̅̚͠G̷̡͖͙̠͇̃́̾͛̒͒́̇̿̈͗̾̾̾͠E̷̙̙̙͕̠̱̱̘͎̺̞̜̐̍̂̎̑̍̑L̴̛̬̲̳͐͋̍̾̋́͂̈̈́!̶̛̱̿̈́̌̆̐̽̑͂̐̓̊

Angel Dust: "...Al?"

There is some soft crackly static from Alastor. Angel Dust: "Hey Al... I- I'm... I'm sorry... can you just... tell me what happened? Please?"

Alastor: "Whatever Vaggie had is contagious."

Angel Dust: "What do you mean 'contagious'?"

Alastor plops down into a chair. Alastor: "An illness seems to have fallen upon the hotel. I remember Niffty complaining about that strange black substance getting into her mouth... then she disappeared and I found her like that. I know as much as you about what's happening or why. We need to keep this contained in the hotel. As of now, no one comes in or out until the situation is sorted."