What about Fear of water? Phobias: xenophobia definition is a bit simplistic; yes 'strangers' but also more towards the fear of foreigners. Usually, used socially and culturally than just 'strangers' but I digress.
character development questions: answer all these questions and you should have a fully developed character for your audience to connect with. a strong character can carry a weak plot; but a strong plot can’t carry weak characters.