Yu Ominae's History
Yu was born in Japan and was an only child to his unknown parents. Not much birth information is given about him. When he was five years old, he and his parents were part of the ARCAM excavation team in Iran. However, the U.S. army assaulted the site, killing everyone involved there including his parents. Yu was not present in the site during the genocide and managed to avoid death. Unfortunately for him, he would later walk to the site alone, only to discover the corpses of his parents.Yu was later placed in an orphanage where he would eventually get acquainted with Rie Yamabishi. He was then taken in to the United States by his uncle, Takashi Ominae, and his adoptive sister, Akiha Ominae. At one point, however, Yu was randomly abducted and was subjected to the U.S.'s top secret military project, Project COSMOS, where him and his fellow COSMOS children were brainwashed, experimented on, and received special forces-level training to be transformed into ruthless killing machines. He was assigned a codename, "Number 43", and partook in an operation involving a raid on an archaeological site somewhere in South America, along with other COSMOS commandos. Yu and his unit wiped out all presences of security guards and civilians there. When a couple attempted to escape from the unexpected massacre, Yu confronted them and held them at gunpoint with his H&K MP5SD, and they were swiftly executed. Their lifeless body posture then reminded him about the deaths of his parents, sending the vengeful Yu into a rampage of killing almost all COSMOS officers and soldiers within the site. Afterwards, Oboro just happened to come across the aftermath of the massacre and found a bewildered Yu inside a trailer. Yu attempted to kill him, but Oboro managed to incapacitate him. He would then escorted Yu back to the ARCAM Corporation.
Yu was eventually reunited with his uncle and sister, but his mental state failed to be improved from the incident. At one point, a group of three robbers barged into Yu's house and attacked Akiha. They also attacked him when he entered the room where she was taken hostage, and one of the robbers held him at knife point. Yu did not hesitate to relive himself as a COSMOS commando and quickly killed two of them. When he was about to kill the last one, Akiha intervened and injured her left shoulder from Yu's knife swing. The surviving robber bolted out of the house due to intense fear from what he just witnessed, and Takashi investigated the scene for him to see two dead robbers, an injured Akiha, and a screaming Yu. He slammed Yu against the wall and told him that there is more to life than just being a murder machine. Takashi persuasion skills have helped Yu in regaining his humanity. He then traveled around the world with his uncle for a while, but eventually signed up to become a Spriggan field agent for ARCAM and underwent training with Oboro and his knife instructor, Bowman. For his first assignment as a Spriggan operative, Yu was tasked in infiltrating the M.A.T. Research Lab in Tokyo and preventing the American military from misusing the Megiddo Flame that can potentially cause the destruction of the entire city if activated. Director Yamamoto provided him a newly issued A.M. suit during a briefing that is designed by Dr. Mayzel and delivers significant protection to Yu from bullets and melee attacks. The given task only serves as a mission directed to Yu, as he must act as a demonstration to ARCAM that they are forces not to be easily reckoned with.
By the time Yu was deployed on the facility, the Megiddo Flame's startup was already initiated by an American Machiner's Platoon operative, Mayor Hummingbat. This forced Yu to ditch the covert infiltration plans and speed things up. At one point, he came across a scientist there, who eventually revealed herself as Yoshino Somei. She gave him the details on what is really happening within the facility and urged him to put a stop to the impending disaster. He then came across Hummingbat in one of the hallways and the two commenced a duel. Yu initially struggled against Hummingbat's ultrasonic waves attack, but still managed to overcome it and neutralized him. With the help of Yoshino and Hummingbat being defeated, Yu ensured the Megiddo Flame crisis was placed to an end.