Born in 1352 being amongst the first children since Galadriel and Celeborn came to Lorien. Her childhood and much of her early adult years were spent amongst the Mallorn trees, not once did she set foot upon the ground in her first generation. Her life has been dedicated to all that is nature, in plant and animal. Not needing to ever bear weapons her fighting skills are very limited, only recently having learnt to weild a wooden staff to assist in her journey to the Grey Havens. During her journey she and her companions stayed within the haven of Imladris where she met someone who would change the course of her path and life. For a while her mind was in turmoil as she was torn between the two paths now laid before her, though eventually both would lead to the same destination they would be along entirely different routes. Finally she succomed to her heart and took the second path following the one she had met in Imladris and becoming a part of the Calarind as an apprentice healer. 

Several years later the healers of Calarind were adopted into Loth-i-Lannoth to provide healing for the warriors. Istienriel happy to follow Galvathalion agreed to join and amongst the others they started a new life in the Grey Havens.  Sadly it was not all to continue as Istienriel hoped as her closest and dearest friend disappeared and during her return visit to her homelands she discovered he had sailed to the undying lands. Distraught with this new she decided to stay longer in Lothlorien until Lady Galadriel told her it was time to return to Imladris. Upon her return she came across her old friend Curugirion and the other flowers and decided to rejoin them again on their journey back to the grey havens.