Eriri is one of the most beautiful girls to attend to Toyogasaki High School. Her family is very affluent. Her father is an English diplomat and she lives in a mansion. She is the secret illustrator for a famous doujinshi circle called ''Egoistic Lily'' under the alias Eri Kashiwagi (柏木 エリ Kashiwagi Eri) when she participates in doujin activities. She was greatly influenced by her fujoshi mother and otaku father. She was the illustrator for Blessing Software.