So this is just a small theory, and I don’t have much evidence to back it up. As a lot of people know, Viper’s real name is Sabine. It has been heavily implied in her voice lines that she has lost her home/family, and that she has some past trauma that is driving her now. In Roman mythology, however, there is a myth called “The rape of the Sabine women” or “the abduction of the Sabine women.” The story refers to a mass kidnapping by Romulus shortly after the founding of Rome. Basically, Romulus was worried that the new emerging power of Rome would not have enough women to populate it, and the Sabines would not let their women marry the Romans because they feared a new power. Since viper is a chemist, I figured that when she says “I will not lose my home again!” She is referring to some lab. It’s possible that this lab was funded by Kingdom and held radianite, and was attacked. The lab would’ve been destroyed and her friends would’ve been killed, and this could also be the incident that turns Omen into a shadow. Maybe the radianite exploded or became unstable due to Kingdom’s interference. The Wikipedia page for the myth also mentions Hersilia, who became crucial in stopping the war with the Romans and the Sabines. I wonder if there is ever going to be a character like this with kingdom, or even maybe the agents themselves. It could be a story that Viper has beef with other characters and Hersilia is crucial in Vioer finding peace.