Koyomi Takanashi is one of the main characters in SOUSAI SHOJO TEIEN.

She's a high school freshman girl characterized by her short hair with glasses. Her personality is serious and meticulous, and she's seen as a model honor student who is even relied on by teachers.

She has a strong sense of justice but is a bit stubborn, and actually gets nervous in crowded or important situations. Her hobby is reading, and she's slowly writing a novel. She is incredibly clumsy, and her drawings are known to be “original.”

Incidentally, she is in the same grade as the previously introduced Madoka Yuki, but they attend different high schools. Since they go to different schools, they wear different uniforms, a detail that can be enjoyed by Plastic Model fans, even within the same series.