Rebecca is a kind and energetic girl from the planet Blue Garden who travels to different planets to record videos for Aoneko Channel, a video-sharing website, with the goal of obtaining one million subscribers. She pilots a spaceship called the Aqua Wing which also functions as a seaboat. She is initially wary of Shiki, but soon warms to him and, after seeing him being mistreated by his robot companions, affirms herself as his friend.

Rebecca may be Lucy's double however don't feel like you need to make a Lucy impression. So long as it isn't a silly voice do what ever voice you see fit.