Why in 19-2000 noodle has black eyes at first and then regular eyes?

In the animated series "Noodle," a character from the band Gorillaz, her initially black eyes symbolize a sense of mystery and otherworldliness. As the story progresses, her regular eyes represent a transformation or deeper connection to the narrative, highlighting her evolving character. This change can also reflect the themes of identity and personal growth prevalent in the band's music and storytelling.