Kei is very dedicated to her work. She is a workaholic and she cannot stand when promises are broken. Hints throughout the game imply that she wishes to become closer to others, but she doesn't know exactly how to do this. As a result, she comes across as slightly clueless but sincere.
Kei is a short girl with pale skin and boyish-cut silver hair. Her eyes are a bright aqua blue color and she wears a near-formal black suit with silver lining with many buttons and shorts, instead of jeans or pants. Below the black high socks with white detailing, and slip on black shoes with small blue and silver detailing on the top. Two long tails come from the jacket and have blue coloring inside. Under her black suit is a white button-up shirt and light blue necktie, the collar having symmetrical black linings.