I'm sorry we were unable to complete the game ;_;
The items you pack initially are actually irrelevant. Each character has an ideal trade, and the items you receive in return are items that were not selected at the beginning. Points and extra dialogue are unlocked by performing ideal trades. The "good route" for each character would have been the genuine route, even if it was uncomfortable. During that route a hint would be dropped to which item they would have liked most. We wanted to reward the player for empathetic and genuine responses.
At the very least, this was our intention, I cannot remember how much of this we completed, only that we were unable to complete more than 2 characters.
I appreciate your comments, especially the one about different characters having different colored text.
One of the erika's was left over from development, we did not finish :T