Nu-13 is a major character in the BlazBlue series, an artificial human known as a Murakumo Unit. She is deeply tied to the story’s central conflict through her obsession with Ragna the Bloodedge, whom she believes she loves. Nu-13 is one of the series’ most iconic antagonistic figures, combining a tragic, unstable personality with immense combat power. She serves as a recurring threat and a key mystery in the overarching plot, representing the emotional and scientific horrors behind the BlazBlue world.