She's the protagonist's younger sister and a first-year student. Pretty much everything annoys her—she's lazy by nature and avoids sunlight whenever possible, which means she spends most of her time holed up in her room watching anime, gaming, and browsing online.
Socializing isn't really her thing. She genuinely doesn't feel the need to interact with people, and she's awkward about it anyway. But she's genuinely talented when it comes to programming. She's actually made decent money by creating lottery prediction apps and other programs, though her most successful venture started as just something she threw together to pass the time—one of her smartphone apps blew up unexpectedly and made her a ton of money.
She barely talks to anyone. Her brother and Mihiro from the student council are basically her only social outlets, which is how she somehow ended up as the student council's accountant, despite that probably being the last thing she wanted.
Despite how cold she acts toward her brother, she actually adores him deeply.
Content compiled by AnimeList.moe from publicly available sources.
