|“||I want to get better and better at my illustrations. I want people to feel moved. And.. I want to beat that person.||”|
She is an otaku and the member of the dōjin circle Fancy Wave (ファンシーウェーブ Fanshī Wēbu?). It was through Tomoya's influence that she became interested in otaku culture. She is deeply grateful to Tomoya for this. She has loved Little Love Rhapsody (リトルラブ・ラプソディ Ritoru Rabu Rapusodī?), an otome video game series released by Sonar for the PlayStation Portable, since Tomoya bought her Little Love Rhapsody 2 and a PlayStation Portable console on her birthday. There is rivalry between Eriri and Izumi, then Izumi decided to compete with Eriri in the next Winter Comiket. Izumi made up her mind to be the illustrator for her brother Iori's dōjin circle "Rouge en rouge".
Izumi is young, small cute girl who is two years younger that Tomoya. She has Burgundy colored hair that is atleast shoulder lenght in a twin tail fashion and two white flowers hair clips on each side and she has red-brownish eyes. Izumi is usually seen with her school uniform, or else her One Piece.
When she was younger, Izumi used to be very outgoing and active and played with the boys. But after being introduced to the world of otaku by Tomoya, she has become immersed in the fandom.
Over all, Izumi has shown to very cheerful and glad, as she usually is seen with a smile on her lips. She usually is seen playing around, especially with Tomoya. Izumi is also very air-headed and childish and she rarely gives up on something that she really wants or likes. She has also shown to be quite matured.
- Tomoya and Izumi have a good relationship, but your typical ''senpai-kouhai'' relationship. However, they are on good terms and call each other by their first names. When Izumi met Tomoya again after three years, she said that she was very happy to meet him again. Izumi also gave Tomoya a letter, however, Tomoya mistook it for a love letter, and Eriri and Utaha also got very angry and jealous, but it turned out that it was a ticket for her doujin cirlce ''Fancy Wave''.
- Izumi is also very grateful to Tomoya that he showed her the world of otaku. However, following her parents job re-location, she moved to Nagoya but never stopped being a otaku. And now, she returns to Tokyo where her Otaku master Tomoya is.
- She is the only main character that did not appear in the first episode (episode 0) in the anime.
- Izumi (泉?) means "spring".
- Izumi has even larger breast than Eriri, as stated by Utaha.