Pros:
- Might be the right choice
- A different opinion/input than your own
-New ideas
Cons:
- Might be the wrong choice
- Input might cause disagreements
- Might have bad intentions
The sentence should be "I had joined the soccer team to meet new friends" if you're looking for a past perfect tense verb, since this is indication it is something that is not repeated.
To reference her mothers Japanese cultural connection.