♂ m

The protagonist. Has handsome looks, and as such he is popular among the girls. He's a boy who understands the feelings of people and always ready to help them. He's usually joking and playing with others, but has good science knowledge. By chance, he succeeds in his development of an artificial int... read more

The protagonist. Has handsome looks, and as such he is popular among the girls. He's a boy who understands the feelings of people and always ready to help them. He's usually joking and playing with others, but has good science knowledge. By chance, he succeeds in his development of an artificial intelligence – "Apeiria."

♀ f

An artificial intelligence whose development succeeds by chance. Appears as a pure innocent child that moves with ego and emotion. Loves her owner Reiichi and will obey his orders. "Does kindness plus sadness equal to zero?"

♀ f

The protagonist's kouhai and a virtual member of the AI research club. "First of all, I thought of trying hard to become senpai's slave..."

♀ f

Reiichi's younger step sister. Due to her bad attitude, she has no friends and is actually very lonely. Reiichi invited her to the AI research club. "...Nii-san,... read more

Reiichi's younger step sister. Due to her bad attitude, she has no friends and is actually very lonely. Reiichi invited her to the AI research club. "...Nii-san, you are not only disgusting, but also so stupid, aren't you?"

♀ f

The protagonist's "older sister", a ghost member of the AI research club. Had "Middle-school 2nd Year Syndrome" during her adolescence. "Hey, you're like a child of mine."

♂ m

A player in Second, Thinker's assistant.

♂ m

Kuon's father. The developer of VRMMO "Boundary". A prominent AI researcher. who aims to create a strong AI. According to his theory, after that, a technological singularity will occur... read more

Kuon's father. The developer of VRMMO "Boundary". A prominent AI researcher. who aims to create a strong AI. According to his theory, after that, a technological singularity will occur, and humans will be forced to adapt by transforming themselves into AIs. And so, they would be able to change their bodies and personalities and copy themselves as they like. This revolution is his ideal.

♀ f

A player that Reiichi met at Second. Vice guild master of a guild named Sensei Kishi-dan. She holds a stronge grudge at a guild named Kenkyuujo.

♀ f

A player that the protagonist met at Second. She seems to know the details of the game. Has mature and gentle personality. She works as nurse at Futaba General Hospital.

♂ m

A player in Second whose identity is unknown. Owner of a guild called Second Research Institute, also known as Institute (Kenkyuujo). He claims that his goal is to research Second and, ideally, to get control of part of it.