Yamada Elf is Izumi Masamune's fellow author and neighbor. Yamada Elf quit school after graduating from elementary and took up an interest in writing. She published a few novels and became the best selling author for a few weeks. Eventually, one of her novels got chosen to be an anime. At some point in time, she saw Eromanga's art and wanted Eromanga to become her illustrator. At first, Elf seems to be an arrogant denpa girl that thinks to highly of herself. While she has an overactive imagination is is demanding, she is also shown to be quite nice. She thinks highly of her skills but can honestly back it up with her novel sales though she refuses to accept when she's wrong. She looks down on other people, but is able to acknowledge the skills and talents of others. She is also generous and open with others, especially her fans, though she arrogantly calls them 'slaves'. She is also extremely intelligent and perceptive, being able to figure out the location and situation about Eromanga and eventually her identity. She was even able to figure out the reason for why Senju Muramasa was so obsessed with Masamune and knew the best ways to improve Masamune's skills as a writter. She was even able to think up plans to help Masamune improve his writting ability in a short amount of time. While she could act lazy, she would secretly work hard when she finds something interesting and tries hard to keep her stuff seemingly magical. She also has many strange habits, which includes cosplay and naked piano playing, and will only add titles like "-sensei" to people she respects. She also has a habit of calling herself "The Best-Selling Author" even after her books were no longer at the top. She was also willing to help Masamune find a job when he needed one and worked hard to help improve his writting skills. She was also able to befriend Sagiri, being one of the first people besides Masamune to be able to open up to her.
Eromanga-sensei
Masamune Izumi is a light novel author in high school. His artist, known only as "Eromanga Sensei" is reliable but Masamune has never met him and assumes he's just a perverted otaku. Masamune's little sister is Sagiri, a shut-in girl who hasn't left her room for an entire year. She even forces her brother to make and bring her meals when she stomps the floor. Masamune wants his sister to leave her room, because the two of them are each other's only family. One day Masamune discovers that Eromanga Sensei and Sagiri are one in the same. Further chaos erupts between the siblings when a beautiful, female, best-selling shoujo manga creator becomes their rival.
