Spoiler!She also likes Konoha, but chose to leave him.
Her past was revealed in "Romancie" books. Her father was the editor of the publisher that was in charge of publishing Miu Inoue's only book. This is why Touko knew what the end was written his book before. She's his FIRST fan that has waiting for Konoha to write second book and knew that Miu Inoue = Konoka.
Her parents passed away in a car accident. Her mother was the one who had been written for her "food" , but after their death, no one could write them until she found Konoha. Her aunt, Ryuuto's mother and the author who was one of the judges who were responsible for giving Konoha award, didn't like her much like her mother because of major story in Romancie books.