Extroverts often:
- Have high energy
- Talk more than listen
- Think out loud
- Act, then think
- Like to be around people a lot
- Prefer a public role
- Can sometimes be easily distracted
- Prefer to do lots of things at once
- Are outgoing & enthusiastic

Introverts often:
- Have quiet energy
- Listen more than talk
- Think quietly inside their heads
- Think, then act
- Feel comfortable being alone
- Prefer to work "behind-the-scenes"
- Have good powers of concentration
- Prefer to focus on one thing at a time
- Are self-contained and reserved

But I think she's pretty on-the-fence

^ yep, has aspects of both

Based on the descriptions, I would say that she also has some traits of an extrovert too.

She's a little bit of both, but more introvert.

She's very socially unsure, shy, had no idea what to do about Phillip, she felt many things about him at once which clashed with her judgment and how the aunts told her to stay away from strangers. She isn't an Extro at all but has a couple of the traits listed.