Toa Narumi

A genius programmer who aims to make money while taking it easy. She's a lazy little sister who shuts herself in her room.

The protagonist's little sister and a first year student of the academy.

She enjoys lazing around and finds most things to be a hassle. Sunlight is her enemy.

Stays at home, mainly in her room, watching anime while surfing the internet, or playing video games. Rather than being unsociable, it would be more apt to say that she doesn't find any point in human interaction. When meeting people for the first time, she keeps conversation to a minimal, instead making her brother deal with them.

Because the handful of people she does interact with -- her brother and her friend, Mihiro -- joined the Student Council, she joins as well, and is made the treasurer.

Is especially good at programming, and develops prediction programs for the lottery or horse racing, as well as smartphone apps, so she can earn money without any effort. One app she developed out of complete boredom ended up becoming a big hit, and earns her a lot of money.

She truly adores her big brother, but she is cold towards him.

(Source: VNDB)