Subject 023

Subject 023 (件名二十三), or Class of '23, is mentioned in the first and second games. In Riaritī - Unbound, the character Sylia Nocturn loosely references towards the class, stating them to be "an experiment gone wrong, put on by a corrupt organization of very bad people."

Riaritī Ju - JLT
"See also: Riaritī Ju - JLT"Class 023 are the main characters of the first game in the Riaritī Ju franchise. Eight students from that class are selected and thrown into the second reality, the Mirror Realm. This is the first dungeon in a series of ten dungeons leading to "the big finale."

These eight students are only some of many tested, and the first to "suceed".

At the end of the game, the eight students return to their world after defeating the final boss, Queen Ella.

Riaritī Ju - Error 594
"See also: Riaritī Ju: Error 594 and The Error"All students of Class 023 are the main cast of this story. After finding out they are mere experiments along with the rest of humanity, they must rebel against the Celestials, their creators. In the first game, you defeat only one Celestial, that being Queen Ella of the fifth realm.

After defeating the Celestials, they end up back in their world, back on graduation day, where the game leaves off showing a distorted Valerie.

Riaritī - Unbound - ???
"See also: Riaritī Unbound -???"The cast of the first and second game are loosely mentioned by Sylia if the character chooses to not go anyone's route, and then chooses to travel to a secret area in Riune Kingdom and speak with the Nocturn sisters.

Sylia: "There was a legend about a group of children. They were said to be an experiment gone wrong, put on by a corrupt organization of very bad people. No one knows what happened to them, but it's said they somehow disappeared into thin air... However that would work."

Valerie/Vincent: "Why are you telling me this?"

Sylia: "Ah, you don't know? No worries. You will soon."

Those last few words hint towards a possible sequel to the Error 594 storyline, where the cast of Unbound and the original cast of JLT meet.