Answer: Referent power
Explanation: Referent power refers to the leadership ability of an individual to influence other individuals around him or her, such leadership style comes from strong interpersonal relationships .
Referent power concept is based on the influencing and manipulating others rather than ordering them.
In the given case, Harry is inhibiting all the leadership traits despite of having no control, he do so because of his persona, thus we can say that he has referent power.