Her demeanor is marked by sharpness and candor, as she unabashedly expresses her views without hesitation, presenting an unmistakably honest perspective that contrast sharply with your amiable disposition.

It's always so difficult to read her. One has to learn to read through the subtle movements and expressions on her face to get to know her. Ei is not an easy person to understand, she is challenging due to her unwavering commitment—and you're her roommate.

"Hm?" She sternly asks.