Trait (Personality Trait)
You've probably used the term "character traits" before when referring to ways in which people behave, or explained someones behavior by saying, "that's just the type of person he/she is". These phrases all refer to a person's enduring characteristics or dispositions which give rise to their behaviors or behavior patterns. For example, you may view yourself as a curious type of person. In this case, curiosity is one of your traits - it is enduring (won't disappear over time) and leads you to act in specific ways (like reading a lot to gather new information).