Quick drawing to give you an idea

Sophie Forestier, from Porte de Clignancourt, or PDC. As the novel is in French, I'll explain here in English who she is.

She is 27, about 5'3/5'4 tall, and she's a civilisation teacher. More accurately, an American civilisation teacher at Clignancourt university. She is currently writting a dissertation about native reservations.
She is an introvert. She looks fragile, and wears grey or black clothes. She doesn't tell much about herself, and is easy not to notice.
She is a good teacher, though, and students like her. Her colleagues have nothing against her either.
She has a male cat, Yosemite, and a younger brother, Tristan, who is 21.

If you want to know more, you might need to learn French and read the book Or you can wait for a translation.