Maybe think about what type of first impression Chie will give, or want to give.

How will she act when she meets up with everyone for the first time?
She doesn't know anyone yet so will she be sarcastic at the first meeting or will she be normal, maybe even a bit shy because she is young?
Lol, will one of her parents drop her off (making her angry and embarrassed) or will she show up by herself?

I hope these questions help.  If not, then tell us what part you need ideas for so we can focus on that :)