Sagiri Izumi

Sagiri Izumi (和泉 紗霧) is the younger step-sister of Masamune Izumi. Shut in her room all day, she is secretly the illustrator for her brother's light novels and is popular on the web, though nobody knows that she is actually a 13-year old girl.

Background
Sagiri was taught to draw by her mother at a young age, and by the time she was around the age of nine, she became Masamune's illustrator. A year before the events of the novel, Sagiri met Masamune, though she didn't realize that he was the author she was working with despite the similar names. After her mother died, she temporarily stopped drawing and going outside. After seeing a live video of someone drawing images and getting response, Sagiri became interested in live video feeds and started drawing images on a camera disguising her face and voice so that nobody would recognize her or learn about her. She eventually started to interact with people who saw her video feed (while still disguised). At some point, Masamune was too busy to cook and she chose to go hungry rather than go outside her room to get food.

Appearance
Sagiri is tremendously cute, a young little girl with porcelain skin, long silver hair tied with two small pink ribbons at the sides of her head, two small pink ribbons at the end of her hair, and a big pink ribbon at the end of the hair at the back. She has big blue eyes. She wears pink pajamas, and sometimes has a dark green hoodie on over them. She also wears pink slippers with bows on them.

She usually has a calmed expression on her face, but sometimes she is seen embarrassed or smiling.

Personality
Sagiri is depicted as a hikikomori who does not get along with others. She loves drawing and appears to be shy and easily embarrassed. Initially, she cared little for her brother but eventually opens up to him. She is normally very quiet and tends to use a speaker to be heard, but whenever she's on webcam drawing live, she is more lively (though still careful to hide her face). Sagiri is also a neat person who keeps her things clean. She was easily prone to anger and jealousy and was more worried and possessive about her brother, more than she would admit, to the point that she sometimes throws tantrums. She hopes to watch an anime created by her and Masamune together. Due to her shyness, she refuses to call her self 'Eromanga' because of how perverted the name sounds and denies having such a perverted name; despite that, she admits that she enjoys drawing erotic images. Sagiri is also stubborn when Masamune forgot to bring her food for a few days, she refused to leave her room to get food because she felt like she'd have lost. Due to fear and embarrassment, on her live video feeds, Sagiri disguised her voice as male.

History
Sagiri was first seen in a flashback of Masamune remembering the first time they met with her hiding behind her mother's back, saying Hello Big Brother. After that, her parents died and their relationship was strained, which ultimately resulted in Sagiri becoming a hikkomori. After Masamune banged on her door to turn off the camera as Sagiri forgot to turn off the camera and was going to change with the live stream still on. After Masamune leans on Sagiri's door to catch his breath, Sagiri opens the door and says hello big brother again for after 1 year after Masamune tries to get her out of her room and after a strong struggle of trying to close the door and after Masamune says that her drawings are very erotic and gets hit on the face with the remote she has in her room after closing the door, she mentions him to come in, after saying to her brother not to touch her in a cold and strict attitude. Masamune asks if she is Eromanga Sensei. The secret co-worker that Masamune hasn't got the chance to meet. Sagiri denies that she's Eromanga sensei and gets surprised when he tries to get closer, getting the wrong idea, she hit him with the remote again and after Masamune explained the misunderstanding stating that her voice is so small and then she gets a microphone and earpiece attached with a speaker and asks if it is enough, he says it's fine, after talking, Masamune says that he wants to be a family again and Sagiri states that even though they're under the same roof, doesn't mean that they are necessarily family and makes him go outside. After that incedent, when Megumi brought the whole first year class to call to Sagiri, Masamune told them to stop, when it was finally over, and he got to Sagiri's room, worried that she may be traumatized of what happened outside, Sagiri flung open the door and pulled Masamune into her room crying saying that someone or something was playing the piano and it was scaring her, Masamune looked from the balconey that found Elf Yamada was playing the piano, nude. After Elf has a arguement with Masamune.

Drawing
Sagiri is a well known artist that many respect despite never seeing her face. Her art is good enough that some claim that she is too good for Masamune and Elf wanted to fight him for her. She was originally only able to draw what interested her and it was only after practicing that she gained the ability to draw fighting scenes and big breasts.

Trivia

 * Sagiri claims that her name 'Eromanga' is taken from the Erromango Island and is not a reference to perverted manga.
 * This fact was told to her by her mother so that she would take the name not realizing its perverted meaning.
 * In Australia, there is a small town by the name of Eromanga.
 * Sagiri owns a mask that is very similar to Stardust Witch Meruru from the author's previous series OreImo.
 * In an interview, the author stated: “I feel that Kirino from OreImo is a pure, innocent girl. This time, the heroine, Sagiri, may seem innocent, but she is quite dirty. I hope readers enjoy finding the differences between the two heroines.”
 * In the anime adaption, Sagiri's art is done by Tiv, the illustrator for Masamune-kun no Revenge.