On every planet, there exists a moon that orbits around its sun. Similarly, each person has an opposite side to them - for instance, someone who is outgoing may have an introverted counterpart. In this case, Kei and Yuri represent these opposites. Despite their differences, they are like oil and water; they do not mix well together.
Yuri, born on the colony world Shack G, is a pop princess with dreams of dating hot young boys. She values her beauty highly and believes that others envy her for it. However, she remains loyal to her job and wields a light saber weapon with skill. Despite their frequent disagreements, Yuri cares deeply about Kei's well-being and worries when she is in danger or upset.
Kei, on the other hand, is more reserved and level-headed than Yuri. While he may not be as obsessed with beauty as Yumi, he still values his job and takes it seriously. Despite their contrasting personalities, Kei and Yumi share a strong bond and work together to achieve their goals.