10 more characteristics to add to the list :)
1. Withdrawing from social activities
2. Fear of being in the limelight
3. Fear of speaking in public
4. Anxiety in social situations
5. Lack of social skills
6. Conform to social norms and not willing to “rock the boat”
7. Always the wallpaper
8. “Nice”, boring, forgettable
9. Being the listener to all with problems
10. Unable to accept and give compliments easily