“Ulster, what're you so freaked out about? We knew they'd catch on to us sooner or later. Let 'em come! At least we don't have to waste our time going to them. We can confront the enemy and make an advance on Ganeishire all in one shot.”
—Larcei in Genealogy of the Holy War
After Seliph's army defeats the Grannvale Empire, Larcei will follow her lover to the destination of his choice. If she does not have a lover, Larcei will return to Isaach instead. She may ascend the throne, provided that both Shanan and Ulster have fallen in battle. Her substitute character is Radney.
Taking after her mother, Larcei is a slightly hot-headed person, who is prone to hyperactive-like tendencies at times. She harbors feelings for Shanan, whom she looks up to, both as a mentor and a caregiver. Johan and Johalva, sons of Danan, also have crushes on her, and either one may join Seliph's army, depending on who Larcei persuades first.
Another point to note is that Larcei is among the few who believe Ayra is still alive after the Battle of Belhalla. A conversation she shares with her brother has her heatedly chastising him when he openly doubts the possibility of his mother's survival, swearing to locate her once the war ends.
In Chapter 6, Ulster may speak to Larcei, and she will gain one point of luck.
In Chapter 6, Larcei may speak to either Johalva or Johan to recruit either one of them.
In Chapter 7, Larcei may speak to Shanan, and she will gain two points of strength, and 100 love points with him.
In Chapter 7, after Darna Castle is captured, if Finn is Larcei's father, he may speak to her, and she will gain five points of skill.
In the Final Chapter, after Dozel Castle has been captured, Larcei may speak to her lover if he is either Seliph, Johan, Johalva, or Shanan. He will gain three points of strength as a result.
Larcei's Japanese name in katakana can also be rendered as Luchtaine, a deity of art in Irish mythology. He is known to have forged the weapons used to battle the Fomorians. The change to Larcei's name in English can likely be attributed to the fact that Luchtaine is a male deity.