If you want to change the appearance of Leliana in the game Dragon Age: Origins, then this mod is perfect for you. Nightingale Redux is a mod that will give you new hairstyles and outfits for Leliana. It contains four head morphs and five outfits from which you can choose. 

You can opt for the simple style which will give you common clothing, bun hairstyle, and Far Song bow, or choose the elegant one with a fancy outfit, crown braid hairstyle, Mont-de-glace bow. Aside from these, you can also use the new epilogue outfits. Remember that outfit swap must be added before meeting Leliana in the Lothering tavern for it to work.