When asked about her past, Imoen slaps your shoulder playfully. She says that you of all people should know, seeing as how you grew up together. Indeed, some of your fondest memories are of meeting this sprightly young lass. She apparently came to Candlekeep much as you did, though 10 years later in life, and she spent much more time with the guff Winthrop than Gorion. "Puffguts" she would call him, much to the old innkeep's dismay.
She seems the eternal child, and is quite content to play the part of little sister, though you are both of comparative ages. You can tell by her hearty smile that she will always be willing to travel with you, no matter what path you take.