dalvin_(fire_emblem)
Scathach (Fire Emblem)'s replacement/substitute in Fire Emblem: Genealogy of the Holy War if Ayra (Fire Emblem) was left unmarried or died before the end of the First Generation. Like many substitutes, he is notably inferior (stat-wise) to the character he replaces.
Notably, he is featured in the manga adaptation by Mitsuki Oosawa, being the only substitute character to do so, alongside his sister, Creidne (Fire Emblem) (who is Larcei (Fire Emblem)'s substitute.) Here, he is depicted as an early member of Seliph (Fire Emblem)'s liberation army, who becomes disillusioned with the rebel cause, following Creidne's capture and death, and attempts to betray Seliph. He fails and is later put to death.