Alenia was a skilled swordswoman who served in the Queen's Knights. Her father had also served in the elite group before being killed in the New Armes invasion of 441. That said, she did not join the organisation to follow her father's wishes or to follow in his footsteps. Instead, she saw her father's death as a sign of his weakness, inviting her disdain.
She was also a stringent follower of the beliefs of the Godwin Faction, believing their focus on military power was best for Falena. As such, she was complicit in the Godwin coup on the Sun Palace in 449, remaining a member of the Queen's Knights under the Godwin puppet regime.
During the Sun Rune War, she would often fight alongside Zahhak. She would be chosen to bear the Twilight Rune, revealing it to the members of the Imperial City Recapture Army at Doraat. However, she had trouble controlling the rune's power. Because of this, and other failures in battle, she would have the rune removed from her and given instead to Sialeeds.
Alenia would continue to fight faithfully for the Godwin regime throughout the war, defending the Sun Palace to the last even as the war came to a close. Alongside Zahhak, she would take a large dose of Raging Nostrum, vastly increasing her strength and vitality. However, even that was not enough to prevent defeat and she would die a violent death from the side effects of the drug.
- Gensosuikoden Kiwami Encyclopedia, page 572