Memento

Memento is a team created by the Creator/Mao.It is primarily made of the series' antagonists. Their goal is to inflict the Resonance into mankind, a event in which humanity will evolve into another species and be freed from their sins.

It was founded many millennia ago.

History
It was made of inhuman creatures with extremely advance technology to avoid a major catastrophe. To protect their species, they tricked humanity into joining forces with them. For a very long time, two young girls were chosen to be the Creator and the Queen, until they'll harvest enough knowledge to start the Resonance project. After the project was kick started, they started creating Ideal Girls, artificial humans without any connections to test the values of various part in the world. The Yang and Nonohara sisters as well as Yumi are Ideal Girls, but they are apparently a few more.

As well as the Ideal Girls, they recruited actual humans that were living lives that were considered regretful, such as Morgana, Regina and Sarina.

Memento planned a emergency weapon in case the Resonance doesn't go as planned, the Miracle Diary. However, Regina took the weapon and hid it somewhere unknown.

Members

 * The Creator (current reincarnation: Mao)
 * The Queen (current reincarnation: Binna Jung)
 * Morgana Lim
 * Regina Springs
 * Sarina Shu
 * Shuling Yang (Ideal Girl)
 * Meike Yang (Ideal Girl)
 * Risae Nonohara (Ideal Girl)
 * Akina Nonohara (Ideal Girl)