"Dancer in the Dark" is a song by FatmanP featuring Megurine Luka. It is in a minor key and heavily utilizes synthesizers, although at the quieter parts a piano and strings take the center stage. The song begins with the refrain, followed by a verse, the refrain again, a second verse, and a final refrain.
The singer sings that she is "fighting against God in such a dirty, cruel place", and that her left arm has been blown off. In addition, her right arm is "full of scars", and her wings have been torn off. These wings are likely symbolic, perhaps representing personal independence, as she claims she has "devoted everything". In the verses, she wonders why she is even fighting, and says the pain from her scars is always tormenting her. She thinks her emotions are growing numb and slowly dying out, and wonders why she has destroyed so much.
The PV depicts Luka in a city at night, holding a gun. Her left arm appears to be present, but is entirely black, unlike her other arm, which is bare. In one scene, a butterfly is shown falling away from its left wing.