1.) She's become desperately lost (again) and is forced to ask directions.
2.) The person she is approaching is reading a particularly interesting-looking book.
3.) She's overheard the person mistakenly give incorrect facts about a particular topic. When she hears this she feels compelled to enlighten them.
4.) The person is a vendor and she wishes to purchase something.
5.) The person has wondered into an archaeological sight she is studying and she wishes to remove them before they break something.
2.) The person she is approaching is reading a particularly interesting-looking book.
3.) She's overheard the person mistakenly give incorrect facts about a particular topic. When she hears this she feels compelled to enlighten them.
4.) The person is a vendor and she wishes to purchase something.
5.) The person has wondered into an archaeological sight she is studying and she wishes to remove them before they break something.