Elrena is a character from the Kingdom Hearts Union χ game. She is a Keyblade wielder chosen by Master Ava to be a member of the faction called the Dandelions during the First Keyblade War. She is also the original self of the NobodyLarxene that is a major antagonist in the Kingdom Hearts series.
During the age of fairy tales, Elrena is a Keyblade wielder living in Daybreak Town and member of one of the 5 Unions that work collecting light in the form of Lux, in which each Union is led by one of the foretellers. With the day of the prophesied Keyblade War approaching, one of the foretellers, Master Ava, was assigned by the Master of Masters to choose Keyblade wielders to create separate faction called the Dandelions that would move on to another world in order to avoid the light to expire as foretold in the Book of Prophecies. Elrena was one of these wielders chosen by Ava that accepted to join the Dandelions.
Master Ava also chose 5 of the Dandelions to be the leaders of each Union within their faction. After the events of the Keyblade War, Lauriam (Marluxia's original self), one of the Union leaders, seeks for Elrena and asks her about his little sister that is missing. Elrena used to go on missions with Lauriam's sister, Strelitzia, and is suprised to know that she had disappeared.
She informs all she rembemered about Strelitzia to him, saying that she was a quiet person always waiting for someone. Realizing how worried Lauriam is about his sister and how much he cares, Elrena willing offers her help to search for more clues about Strelitzia's whereabouts. Elrena's Chirithy comments that is not her usual behaviour as she never cared much about other people.
Elrena decides to investigate the building where Strelitzia was last seen. Inside the building, she sees a sort of ghost-like hologram of Strelitzia holding her Chirithy during her last moments after she was attacked by an unknown character. When she tells Lauriam about her findings during their next encounter, he runs into the building screaming for his sister, but this time there is nothing inside. Elrena is saddened to see Lauriam’s frustration and, despite their efforts, they are both unable to figure out what happened to Strelitzia.
After Kingdom Hearts Union χ
After the events of Kingdom Hearts Union χ, under unknown circumstances, Elrena's heart is consumed by darkness and she turns into a Heartless. However, because of her strong will, a Nobody also is created: Larxene. Larxene
joins the Organization XIII, and there she meets Marluxia (Lauriam's Nobody). Larxene seems not to have memories of her previous life, but she soon grows close to Marluxia and they eventually plan to overthrow their leader to rule the Organization themselves. Larxene aiding Marluxia's plans paralells her helping him when they were their original selves. However, this fails when they are both defeated and destroyed by Sora. Afterwards, Xenahort revives their Nobodies to be part of the real Organization XIII, but Sora destroys all the members of the Organization again. Larxene accepts her second defeat by Sora, preferring to be destroyed than to become a vessel to Xenahort's heart. While she is vanishing she tells Sora she only joined the Organization to be with someone, and although she does not reveal who the person is, it is implied to be Marluxia. With the destruction of her Nobody, Elrena is recompleted and revived again.
Lauriam and Elrena eventually meet again as Nobodies and start to make plans to overthrow their leader in the Organization XIII.