While living in Undermountain, Errya charmed the bard Ellithral and ordered him to direct all the adventurers attracted by the dying message of Halaster Blackcloak to a particular spot in the dungeon with the promise of a "post-earthquake" map of Undermountain. She would meet with these adventurers accompanied by her two bugbear bodyguards.
Errya was a very self-centered individual. If she didn't get what she wanted or receive proper praise for her actions she would hold a grudge and would often extract an untraceable revenge against her offender. Her mother admired her ruthless aptitude, while her father was oblivious.
Errya was obsessed with regaining the lost fortune of her family. Her demeanor was described as viper-like.
- Ed Greenwood and Steven E. Schend (July 1994). “Who's Who in Waterdeep”. City of Splendors (TSR, Inc), p. 14. ISBN 0-5607-6868-1.
- Eric L. Boyd, Ed Greenwood, Christopher Lindsay, Sean K. Reynolds (June 2007). Expedition to Undermountain. Edited by Bill Slavicsek. (Wizards of the Coast), p. 63. ISBN 978-0-7869-4157-5.
- Eric L. Boyd, Ed Greenwood, Christopher Lindsay, Sean K. Reynolds (June 2007). Expedition to Undermountain. Edited by Bill Slavicsek. (Wizards of the Coast), pp. 46–48. ISBN 978-0-7869-4157-5.