Imoen

Imoen is a human thief and one of the five companion which can become a party member in Baldur's Gate and Baldur's Gate II: Shadows of Amn. In the game canon, Jaheira, Imoen, Khalid, Minsc, and Dynaheir company Gorion's Ward in the events of Baldur's Gate until they were captured by Jon Irenicus, which is shortly after the events of Baldur's Gate. Baldur's Gate II: Shadows of Amn starts after the party has been captured for quite some time.

Baldur's Gate
Imoen is the player character's childhood friend. They grew up together, from the age of about 10, in the library fortress of Candlekeep. In the Prologue she will greet you when you approach the front of the Candlekeep Library proper. At the start of Chapter 1, after the tutorial prologue, she will track you down in Lion's Way, and join you as your first party member.

Imoen is a pure thief, and has the best overall stats of any joinable character in the entire saga. Being a thief she is a valuable companion: only thieves can disable traps, and there are many to overcome. She has high Charisma, so she can also be invaluable as a 'front man' for getting the best prices in shops, and good reactions in some conversations. She has in her inventory at the start: Short Sword, Short Bow, 40 Arrows, 3 Potions of Healing, 1 Oil of Speed, 1 Wand of Magic Missiles.

In-game biography (Baldur's Gate)
"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 gruff 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."

Baldur's Gate II: Shadows of Amn
After you have been captured Jon Irenicus, he starts experimenting on you, because you are a child of Bhaal, and on Imoen as well for unknown reasons. When an organisation of thugs decides to attack, Imoen manages to break out of her cage and she will free Gorion's Ward from his cage. As byproduct of the experiments, Imoen seems to have lost her courage and she is terrified while she in the dungeon.

After escaping from the dungeons, Imoen is captured by Cowled Wizards, after attacking Jon Irenicus with magic, which is forbidden to use in the city of Athkatla.

During the events of Baldur's Gate, Imoen has become a dual-class thief mage when she she was a lvl 7 thief. Her character abilities have not improved, while chracter abilities of returning companions have. When she joins the party, she doesn't have any equipment.

In-game biography (Baldur's Gate II)
"Imoen chuckles when you ask her about her past, assuming you are just trying to keep her mind on happier times and places. She indulges you, and certainly does cheer up when speaking of how you spent your youths together in Candlekeep. She arrived there the same as you, in the company of your foster father Gorion, but despite this similiarity she grew up much more carefree than you did. Indeed, her lightheaded outlook has long kept her immune to the hardships of the world, though the dark confines and horrors of your current location have definitely taken their toll."

Baldur's Gate

 * "I've done had enough of this."
 * "Watcha' want?"
 * "I care not"
 * "Yep?"
 * "This way"
 * "I am gone."
 * "Yer a queer fellow."
 * "I know nothing more, so leave me to go."
 * "Good on you if you save the day."
 * "Do ya wanna tell me a story bout' trollops and plug tails? Please?"
 * "Back home, Puff-guts would always tell me a story."
 * "Heya! tis' me, Imoen." (When first encountered)
 * "My blade will cut you down to size!" (When attacking)
 * "Tis' something most unnatural here, and I want no part of it." (When in a dungeon)
 * "-Yawn- I'm gettin' a little sleepy." (When tired)
 * "Booooooriiiing!" (If not doing anything for a while).

Baldur's Gate II

 * I'm getting sleepy. Whis we could stop for a bit." (When tired)
 * "Good to go."
 * "This place is too darn creepy. I really want out of here." (when in a dungeon.)
 * "Gotcha"
 * "Right as rain."
 * "Just like good times. Expect for the torture and all that."
 * "Now I remember why travelling with you is such fun" (when reputation is high)

Trivia

 * Imoen's face, personality and dialogue may have inspired the creation of Bioware character Leliana, from Dragon Age Origins.