|First game||Fire Emblem: Genealogy of the Holy War|
Deirdre is a playable character from Fire Emblem: Genealogy of the Holy War. She is the wife of Sigurd, the mother of Seliph and a descendant of Heim through her father Prince Kurth and Maira through her mother Cigyun. She is also the half-sister of Arvis.
Deirdre initially lives in a small village in the Spirit Forest of Verdane. Despite being forbidden to come into contact with men, she falls in love with Sigurd when they meet in Marpha, and later marries him after the end of Chapter 1. She gives birth to Seliph between Chapters 2 and 3, with Seliph inheriting minor Naga blood from her.
After Sigurd captures Madino Castle in Chapter 3, Deirdre attempts to join him and the others in battle, but as soon as she leaves the castle, Manfroy warps in front of her path and erases her memories. He then warps her into a convenient location for Arvis to find, intending for him to fall for her. This is done to have the duo bear a child, who will as serve a vessel of Loptyr. Some time after Arvis finds her, he falls in love with her at first sight due to her resemblance to their mother and the two are married.
After Sigurd's death, Deirdre bears Arvis's two children, the twins Julius and Julia. Several years later, Deirdre is slain by Julius after he receives the tome of Loptyr from Manfroy, which essentially causes him to lose his mind as Loptyr possesses his body. With the last of her strength, Deirdre is able to prevent Julius from killing Julia by warping Julia away to safety.
After Seliph defeats Arvis in the penultimate chapter, Deirdre's spirit appears alongside Sigurd's, and she reminds Seliph to always treasure the people around him. She is also shown to not bear hatred to Arvis for what he did to her, as evidenced by the fact that she does not express joy for the Emperor's death despite Seliph proclaiming to her that he avenged Sigurd's death.
If Verdane is not inherited by Jamke's children, Deirdre is reputed to have become a legendary and saint-like figure in said location, and is referred to as the "Holy Maiden". Upon learning that Seliph is her child, the populace requests for the kingdom to be annexed into Grannvale, which Seliph gladly accepts.