From his Quirk to his origins, Chisaki was a villain who didn't take long to become loved by the fandom. There was one question about his appearance though - Why did Chisaki often wear a mask? To put ...

Plague doctors wore spectacles and a mask with a beak-like nose extending ... which allowed the doctor to breathe while ...

A 1619 outbreak of plague in France, rooted largely in Paris, led to the first medical mask. As the disease killed some 80 percent of those it afflicted, French doctor Charles De Lorme invented an ...