Mugen Senshi Valis

A manga based on a classic video game features three realms: the Human World, the Dream World governed by Valia, and the Dark World ruled by Rogles. Rogles, alongside five dark lords, seeks to conquer the other worlds and has taken a source of light power from Valia. In response, Valia summons a Valis Warrior from the human world to reclaim the stolen power. Yuko, a normal high school girl, is drawn into the Dream World and becomes this warrior. Her mission is to stop Rogles and recover the lost light. However, she faces additional challenges as Rogles has his own warrior, Reiko, Yuko's friend from the human world. Reiko, now a Vecanta Warrior wielding dark power, treats Yuko as an enemy. Yuko must decide whether to fight her friend or find a way to restore her.