Experiment ЯΩ

A mysterious lab on Remnant is rumored to be a place where human experiment happen, they used human being to fused with the creatures of Grimm, their goal is to create the ultimate being in existence, who has the combined strength of human and Grimm along with it's own Aura and Semblance. However, fusing with a Grimm requires a capable candidate. In many failed attempts they were a success in creating the first being the dubbed him "β" or Beta in another attempt they created "Δ" or Delta and so on and so forth.

Finally after 50 years of research they have finally succeeded in creating the ultimate being they dubbed him "Ω" or Omega. Unlike the past experiments Omega is the deadliest he is considered to be flawless. However during the experimentation a scientist noticed a slight malfunction in the process but shrugged it off, that malfunction causes Omega to break free from his pod and kill everyone in the room, escape from the lab. A scientist knows what sort of malfunction that is, the malware is known as "Я".

Experiment Ω was lost until....