Himeko is an adventurous and brilliant scientist. As a child, her curiosity about the universe was sparked by a chance encounter with the stranded Astral Express. This event fueled her determination, leading her to eventually repair the train herself. As the navigator of the Astral Express, she is a natural leader, gathering companions for their shared journey. She is patient, approachable, and a thoughtful listener, always willing to hear out those around her.