Often a person’s body language will make them seem more intimidating. Likewise their bank account, social standing, degrees before and after their names, height, etc.
We can only be intimidated when we let ourselves feel inferior to them, and no one can make us feel inferior without our permission.
Now as to the mosquito problem. They HATE the smell of Bounce fabric softener sheets for some reason, according to what I read recently. Try keeping a sheet of Bounce in your pocket and rub it over your arms and face and see if it helps.