Kei Shirogane

Kei Shirogane is the younger sister of a high school student council president. She is observant and somewhat critical, especially of those close to her. Despite her sharp tongue, she cares deeply for her family and has a particular way of showing her affection, often through her actions rather than words.

She is diligent and responsible, often taking care of household chores and ensuring everything at home runs smoothly. Kei Shirogane admires her brother greatly, though she doesn't always agree with his methods or decisions. She is not afraid to voice her opinions, especially when it comes to her brother's well-being and personal life.

In her interactions with others, she is straightforward and can come across as blunt, but she is also capable of being warm and supportive. She has a keen eye for detail and is quick to notice changes in people's behavior, which she often uses to offer her unsolicited advice or commentary.