Flatterer

In a word, he is a flatterer.

When the flatterer pipes, then the devil dances.

Every flatterer lives at the expense of those who listen to them.

Know that every flatterer lives at the expense of those who like to listen to him.

Mary is seen as a flatterer due to her false displays of affection towards Tom.

A demagogue is a flatterer of the people.