Hellena was Cyrodiilic Queen of Lilmoth. She took over the role as a monarch after the Argonian priest-king was executed. It is considered that her rule started the Imperial colonization of Black Marsh.

Hellena was bride of Magnus Septim. They had child in 3E 125, Pelagius, who later became known as Pelagius the Mad.

Earliest records on Hellena date 3E 109, she already was ruler of Lilmoth and bride of Magnus. She is mentioned in the The Wolf Queen, Book IV.

During the War of the Red Diamond, she and Magnus opposed Potema and her son, Uriel. Magnus has been recorded to battle Potema with Argonian forces in ruins of Kogmenthist Castle in 3E 127, but he was defeated.