"Rikako is a major character in the manga ""Call Me By My Name."" She is a high school student who moves from Tokyo to a coastal town during the summer vacation. Rikako is known for her intelligence and maturity, as well as her cold and aloof personality.

Rikako's introduction in the manga is in volume 1, chapter 1, where she is shown sitting alone on the train, wearing headphones and engrossed in a book. Her name is first mentioned when her father calls out to her as they arrive in the town, asking if she is okay.

Throughout the manga, Rikako is frequently the subject of conversation between the other characters. Her classmates are curious about her and often talk about her behind her back, commenting on her beauty and intelligence. Her name is mentioned many times in these conversations, as well as in the thoughts of the protagonist, Taku.

Rikako's personality is a major part of her character. She is often described as cold and aloof, and she struggles to make friends in the town. Despite this, she is shown to have a kinder side in some instances, such as when she helps Taku study for his college entrance exams.

In volume 2, chapter 6, Rikako reveals that she has plans to move back to Tokyo after the summer vacation. This news shocks Taku and the other characters, and her name is mentioned frequently in the subsequent discussion of her departure.

Overall, Rikako is a complex character who is both admired and criticized by the other characters in the manga. Her name is mentioned frequently throughout the story, and her personality and actions play a significant role in the plot."