Segnbora dareiln Welcaen tai-Enraesi, sorceress, swordswoman, and polyamorist -- my heroine. Breaks her own horses, wields a sword made from a splinter of Death's door, helps put the exiled Prince Freelorn of Arlen back on his throne, is possessed by a host of dead dragons, and deals with the child sexual abuse she suffered.

See Diane Duane's:

• The Door Into Fire
• The Door Into Shadow
• The Door Into Sunset
• The Door Into Starlight (apparently only available as the second half of The Tale of the Five:  The Lion and the Door which also contains The Door Into Sunset.)