- Pen Name：
- Masamune Izumi
- Age：
- 15 (High School First-Year)
- Blood type：
- A
Masamune Izumi (pen name: Masamune Izumi, with his first name written in katakana instead) works as a light-novel author while attending high school.
He's the type who can't search the Web for his own titles or pen name.
He has a shut-in for a little sister.
- Pen Name：
- Eromanga Sensei* For some reason, people often add "Sensei" when calling her by her pen name.
- Age：
- 12 (Middle School First-Year)
- Blood type：
- A
Masamune's little sister, though not related by blood. Due to certain circumstances, they are living virtually alone together.
Sagiri has shut herself away from society and refuses to leave her room if there is anyone else in the house.
She works as an illustrator using the pen name Eromanga Sensei and loves to draw lewd pictures.
- Age：
- 14 (Middle School Second-Year)
- Blood type：
- I forget! (*Self-proclaimed)
A super-popular author writing for a different publisher than Masamune’s.
She calls herself a "greater novelist" and is good at writing slightly risqué titles. She is fond of Eromanga Sensei’s illustrations.
- Age：
- 14 (Middle School Second-Year)
- Blood type：
- O
A younger but more seasoned — best-selling, in fact — author writing for the same publisher as Masamune.
Her total book sales top 14.5 million copies but, for some reason, she treats Masamune like her nemesis.
- Age：
- 12 (Middle School First-Year)
- Blood type：
- B
A girl in Sagiri's homeroom class. She is a Super Class Rep with the most exceptional communication skills.
She loves to make new friends and is always willing to put all her efforts to that purpose.
In other words: a natural enemy for Sagiri.
- Age：
- 15 (High School First-Year)
- Blood type：
- A
Masamune's classmate. She is the poster girl for "Takasago Bookstore," and Masamune’s only female friend who knows about his occupation.
She is also a big fan of Muramasa.
Tomoe really loves light novels and gets angry when people make fun of the genre.
