Most Helpful Guy
They're mist likely not as good as they perceive themself to be
Most Helpful Girl
They're not good people. If you need to brag about something, then it means you are not that kind of person or that you don't know how to do something.
When you are something or when you know how to do something, you just do it or show that you are that kind of person. You don't need to tell no one.