Yuko Asou

Yuko is one of Valia's daughters, along with her younger twin sister Valna. Although born in Vanity, she was sent to the human world for unknown reasons (possibly due to the eternal conflict between the dream world and the dark world), and was then adopted by a human woman there when she was a baby. After many years, she became a normal high school student with a conflict-free life, but everything suddenly changed when strange creatures attacked both her hometown and her. She used the Valis sword that appeared in front of her to protect herself, and then met her true mother, while still being ignorant of the fact. Afterwards, she learned that she was destined to protect the three worlds from any threat, with those three being, the Earth, the land of spirits, and the dream world Vecanti. This started her double life as a warrior of Valis as she realized the dark objectives of the demon lord Rogles. She had to face many fierce opponents and watched several people die right in front of her eyes, such as her friend Reiko. In the process, she discovered her true identity as Valia's daughter and accepted Valna as her sister.

After a long time fighting, Yuko decided to preserve the Valis sword in Valhalla, outside of the reaches of evil hands, becoming the Valis goddess.

She became aware then that a new evil dominator named Galgear had begun a new plot. putting the three worlds in jeopardy once again and then tested a new warrior, Lena Brande, to give her the Valis sword. Lena successfully completed the trial and became the new Valis warrior. After this, nothing about Yuko's fate is known as she still seems to live in Valhalla.

Yuko is a normal high school girl. When the series started, she was portrayed as a lazy, shy and fearful girl, although, when needed, she is brave and full of determination. She is also kind and worries about her beloved people (such as Reiko or Valia). She seems to like little animals (such as puppies), toasted bread and fashion (as seen when she puts on any of her suits).

When becoming the Valis goddess, Yuko becomes more reflective and calm, but also becomes highly demanding as seen when testing Lena.

Yuko is very athletic, she has an innate ability to jump highly with and without the Valis power.

As the Valis warrior, Yuko can use her sword to attack at range or with different types of offensive shots. She can also use the Fantasm Jewels to cast many spells and is invulnerable to many attacks that would be deadly for normal humans. Within this form she can jump even higher and slide under narrow passages. In Valis SD she can shoot with her sword upwards and do a double jump.

As the Valis goddess, she can levitate (as Valia did), throw sparks and make copies/illusions of herself in many forms.

During the main series in the first three games, she changes progressively from her normal life to that of the Valis warrior, by fighting many dark emperors and their armies, protecting Vecanti and the human world from their ambitions, and afterwards helped by Valna and Cham.