Kai Satou

Kai has a seemingly aloof and absentminded nature. He's often quiet, even during intense discussions and accusations. Because of his quiet nature, he isn't considered to be much of a person of interest to the group. Though like the others, he makes it apparent that he wishes to try his best to contribute to their advancement, even if his withdrawn demeanor and weird aura put Sara off.

In Kimi ga Shine Bangai-hen: Seizon Shima, the series spin-off game, more about Kai's personality is revealed. When speaking with Mishima, he makes a few attempts at jokes and poking fun at him, though they aren't received well; possibly due to it being unexpected of his usual self and inexpressiveness.