The lineage of House Duncan can be traced back to Lady Sheena Duncan, the youngest woman to ever become head of a Noble House. Sheena was only seven years of age when she ascended to lead her people. Having originated from House Ethoria, Sheena is known for her olive skin and slick, charming dark eyes. She also spoke conversational Raemttesh and was fluent in Gaecean and the Common Tongue.
Lady Sheena Duncan was one and ten when Serafina Girelon was born and by the time Serafina was ten years of age, Sheena marched her people alongside House Starlight to conquer the East to set up a throne for Serafina Girelon.
In her time in Inmortalis she was recorded to have never married but chose one of her daughters, whose father was unknown to all, as heir to her seat of power. Sheena became Serafina's greatest advisor and was ultimately against Lanier Leonhart, but was unable to stop the unification of the two Great Houses. She was also present when the Queen of House Girelon appointed Liarra Girelon as Queen regent when Serafina was in Titan Ruins with Lanier and their children. Lady Sheena advised Liarra and served as Hand of the Queen to House Girelon faithfully.
It was later said that Lady Sheena devoted her life and her heart to the greatest beauty of Inmortalis like many men. Later, however, Lady Sheena died due to complications of the heart, but before her untimely death she requested for Queen Serafina to be beside her as she died, which the Queen was grateful for and granted without a second thought. Many said that the great Lady of House Duncan died of a broken heart, nonetheless she has devoted her life in service.