Upon her first appearance, she had a stiff and cold personality with a business-like tone, much like the impression Aris gave early on. However, seeing her bicker with the Game Development Department shows that she is capable of clear emotional expression. She used to define her reason for existence through Aris, centering everything around her and remaining completely indifferent to others. Now, like Aris, Kei has gained humanity through a series of events and cherishes her bonds with everyone. It seems that Aris choosing the path of a hero rather than a demon king, and Sensei's guidance, influenced Kei's personality. By the time of Volume 2, her words and actions carry more emotion; while her way of thinking remains similar, she has solidified into a tsundere who looks out for those around her and treasures them despite her bluntness. She uses polite speech and can feel a bit cold, but that's just part of being a tsundere. Speech style: Hello, Sensei. Surely this is a bit embarrassing! (Only uses this tone when embarrassed; not normally like this.) Age: Unknown (but equivalent to a 1st-year high schooler) Physical: 151cm tall, slim chest, black hair, red eyes. (Female)