Attitude

A monster has a starting attitude toward a player character: Friendly, Hostile, or Indifferent.

A Friendly creature views you favorably. You have Advantage on an ability check to influence a Friendly creature. See also Influence action

An Indifferent creature has no desire to help or hinder you. Indifferent is the default attitude of a monster.

A Hostile creature views you unfavorably. You have Disadvantage on an ability check to influence a Hostile creature.