I used this to show character because at one point she said that she wished that she wanted to climb trees with fritz again, which shows climbimg trees is something she likes to do and can be contributed to her personality/character.
I added this for symbolism because her father's laugh symbolizes good times and hope, a feeling that everything will be alright. I say this because Annie once said that she wasn't scared when her father laughed like that.
I chose them having to disguise themselves as conflict. I had this here because it shows that they need to go lest they are captured by the Germans.