No! A vivacious personality is a lively, vibrant personality. A vicious personality is a cruel, malevolent personality.
You have lots of personalities. Some were developed as you grow and some were innate. Those developed ones do change but your innate personality do not. Its constant because it is really who you...
People change personalities to please different types of people.
A person can have multiple personalities. It is the person who has the disorder and not the personalities who have the disorder.
Personality development