Uran (also known as Astro Girl, Sarah or Zoran) is Astro's younger sister. She was created by Dr. Ochanomizu and was presented to Astro as a birthday gift or New Year's gift (depends on which version). She often finds herself getting into trouble and causing trouble for Astro. She possesses a part of Astro's strength but none of his powers, but in the 2003 series she was given the ability to talk with animals. She's emotional and caring like her older brother as she was based off of his design. She has the closest relationship with Astro. She is cheeky, and yet loyal to her brother.