behaving as if you have responsibility or authority but without having been chosen by other people.
self-appointed
behaves confidently and is not frightened to say what they want or believe.
assertive
embarrassed or nervous.
Awkward
very famous or popular, especially being considered to represent particular opinions or a particular time.
Iconic
determined to do what he or she wants and refuses to do anything else.
stubborn
thinking about something or someone, or doing something, too much or all the time.
Obssessive
very determined to achieve something.
Single-minded
