Orphaned at a young age, Heustienne was taken in by House Brucemont and to preserve her new family's heritage, she wanted to become a dragonslayer. She joined the Temple Knights and was eventually accepted into the Order of the Knights Dragoon. She was praised for her astounding agility and determination but was unsuccessful in attaining the title Azure Dragoon. She is recognized as the order's second in command whenever Estinien leaves Ishgard. 
Heustienne is a female Wildwood Elezen with long blonde hair and purple eyes. She first appeared wearing chainmail armor and a Lominsan lance, but later on wears salmon colored Drachen Mail with a Gae Bolg lance, and finally wields a lance named Peregrine.
Heustienne is an eager student willing to learn new skills from the Warrior of Light, she has a grudge against the dragon Graoully, and previously had a rivalry with Estinien.
- Eorzea Encyclopedia, p. 225