Answer:
Character is built through selflessness and not personal achievements.
People value good character over talent.
Explanation:
The second and third sentences are the ones that best represent the theme of the passage.
Rosie is the youngest of five children, and it seems like she is the only unremarkable one. All of her siblings have some sort of talent, while she doesn't seem to consider such things important. There is way more depth to her character than to her siblings'. They are described as solely focused on their achievements, while she is there to always help everyone and doesn't mind it. She is selfless, and it seems like she has more potential than her shallow siblings.
This is what their aunt notices, which is why she chooses Rosie as her companion. She values good character over talent, knowing that Rosie will be there for her if she ever needs her.
