Hand Signals
As a character, you are supposed to throw up in your mask if you are sick. Taking it off is not an option. You cover one eye with your hand and raise the other arm in the air to alert maintenance that you are not well.
Also, if there is another character (same as you) you cannot, under ANY circumstances, be seen with them. You also must take a course to match signature style for autographs.
Story credit: Reddit