, I just started my umpteenth run in BG, and I haven't played in a while, so my perception of the dialogues is somewhat refreshed.
I just noticed a couple of things in Imoen's initial dialogues that kind of struck me in a new way. You either call her "little one", or "child" in your first responses to her initial "Heya" dialogue. She will then protest that she is not that much younger than you, "though you sure got tall fast." Then, your first dialogues with her when she tries to join you outside Candlekeep also imply that you consider her a child to you, including your rejection dialogue choice, where you practically call her a "brat" to you.
Assuming for the sake of argument that you are both human, what relative ages would make sense for these dialogues? I'm thinking something like, I'm about 18-22, and Imoen is about 12-15.
If you interpret all the early (and later?) dialogues from the point of view that Imoen is a fellow orphan who came to Candlekeep about five years after you, and was five years younger, it can kind of shine a new light on the relationship between the two of you. She could either be seen as an irritating but beloved kid sister (or an irritating and hated kid sister you can't wait to get away from), or a young girl that had a crush on you.
I think that if you think of Imoen as someone you grew up with, but who was still a child or a "tween" when you had just entered your young adulthood, and that she and you were always close, in either an older-younger sibling dynamic, or as her having a crush on you at first, that you would treat sensitively while letting her down easy (or not), can change the whole dynamic between you and her throughout the trilogy.
What do y'all think?
"Joni, Imoen, please don't cry. You'll forget me, by and by. You're just 15, I'm...22, and Imoen I just can't wait for you." Conway Twitty.