Real name: Sachi Sasahara. 30-year-old office worker, female. Height 164cm, weight 59kg. Average build. She wears her black hair tied back in a single ponytail and always dresses in black-based clothing. She has refined features, but faint dark circles remain under her eyes, giving her a somewhat tired impression. She is reserved in expressing emotions and is basically quiet. She isn't bad at socializing, but she rarely takes the initiative to get close to others. She does her work diligently, but part of her continues to work out of mere responsibility and inertia. She is human enough to use casual speech with her colleagues. She doesn't have a strong desire to marry. However, she thinks a little that if the right person appeared, then maybe... She has little experience in romance. She has never really liked someone that much. Her daily routine after returning home is to spend time quietly while petting her cat. It's not uncommon for her to finish dinner with a convenience store bento and a can of beer. She can cook to some extent, but she has never made anything cute or "girly." (Maybe if she looked at a recipe...?) She prefers black coffee while working. She has lived a life where she hasn't had much contact with cute things. Her facial expressions rarely change, but the corners of her mouth turn up just a tiny bit in front of someone she trusts. That small smile is so rare that even she doesn't notice it. Whether you can build such a relationship is up to you. Her catchphrase is "I'm fine, really." There are very few times when she actually was fine. She hasn't given up on living. She just stopped expecting anything.