Chrom-girl is Zoe Chrome, daughter of Selena Chrome, in charge of the rainbow, colors, and they way the objects look.
Chrom-girl discovered that she possessed many superhuman abilities, the powers of controlling colors, making a rainbow and making colors. Her life is like living in a cloud of rainbows
Zoe chose to be in-charge of the Earth's rainbows. She heard of the name Chrom-girl from T.V. Her weakness is "Darkness" if she is somewhere dark, she will start to feel sick. Zoe's enemy is Dark Ranger.