Palliators are people who make something seem less bad or less painful.
Palliators can be helpful because they try to make things better, but sometimes they can also make things seem better than they really are.
Examples:
The doctor is a palliator because he tries to make sick people feel better.
Her kind words were a palliator for my sadness.
The palliator tried to make the bad news seem not so bad.
The ice cream was a palliator for the hot weather.
His apology was a palliator for his mistake.
The toy was a palliator for the little girl's sadness.