Leliana's Past

Leliana's Past is Leliana's personal quest.

Walkthrough

 * Get enough approval with Leliana that she tells you about Marjolaine.
 * Have a random encounter while traveling with Leliana in the party where you confront mercenaries hired by Marjolaine.
 * Go to Denerim.
 * Enter the building where Marjolaine is.
 * Confront Marjolaine via dialogue.
 * High difficulty encounter in which the party fights Marjolaine and some mercenaries, including two mages who remove your buffs.
 * Alternatively, it is possible to confront Marjolaine without killing her if you follow the dialogue options about Leliana leaving her past behind her.
 * Loot a very good Tier 7 bow named Marjolaine's Recurve and some Chevalier armor from a nearby chest

No matter how the meeting ends, there is no approval change from Leliana and party members (Alistair, Wynne, Morrigan, Shale and Zevran confirmed).

Hardening Leliana
You can help Leliana sort through her feelings once back in camp and this will result in higher approval. At this point you can significantly shift Leliana's alignment and future.
 * No change - remind her that Marjolaine chose her own path and that Leliana is a good person
 * "Harden" Leliana - tell her that she is exactly like Marjolaine and that she can admit that she enjoys killing

"Hardened" Leliana will no longer object to some of the morally ambiguous choices made by the Warden (such as defiling the Sacred Ashes), will be less judgmental of Morrigan, and will have different ending epilogues available.

Note: Players who haven't updated to the 1.02 patch will find the Marjolaine dialogue may not appear if your approval is too high and/or you are in a Romance with Leliana. In this case, Save and try breaking up with her to see if you get the dialogue. It will be about "minstrels and spies in Orlais." This issue is listed amongst the bugfixes for the 1.02 patch.

Journal
If Marjolaine dies

Marjolaine mistakenly believed that Leliana's reason for emerging from the cloister was to exact revenge on her. She made the first move, sending men to kill Leliana. Marjolaine could not be allowed to hound Leliana, so you killed her.

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If you let Marjolaine go

Marjolaine mistakenly believed that Leliana's reason for emerging from the cloister was to exact revenge on her and made the first move, sending men to kill Leliana. Leliana told Marjolaine to leave and to never come back, but Marjolaine does not seem to be finished.