[REDACTED] Shion and Nazuki were detained at Facility Z-13 on the former Japanese federation after their abilities were noted by several agents in the local orphanage.
Over three years, no physical growth was recorded, but incidences of violence from Shion increased, resulting in a total of 5 deaths and 27 injuries requiring hospitalisation. Shion's binding to the entity known as Ira was confirmed after a sighting during the fourth incident (see incident log 5.2.4). At the time, Nazuki's binding was unknown (refer to Case File XIII - Scopium).
Agent [REDACTED] was trained and sent to build a relationship with the two, establishing himself as a father figure for them to follow and to simplify indoctrination. To avoid similar failure with subject 'Celeritas', said agent was selected from the specialised Method platoon for deep-strike double agents. After another two years, the orphanage was destroyed and its inhabitants cleansed to prevent witness testimony, after which they were relocated to Facility Z-13.
There, they were given the cover story of being 'special' to facilitate testing of their abilities. When live subjects were used as material, they were labeled as 'evil', although both Shion and Nazuki displayed reluctance to terminate live human subjects. Only after a convicted pedophile was locked in a room with both subjects and instructed to deal with them as he wished, did Shion proceed to terminate him with extreme prejudice. At this point, the sisters began raising suspicions with Agent [REDACTED] regarding the program, after which further measures were taken to improve the quality of the surrounding cover.
Still, their suspicions were great enough that Agent [REDACTED] proposed an induced coma before the sisters attempted to break out of their isolation. His request was granted.
In the first incident of the dormant entities residing in their bodies being 'awokened', the sisters' physique rejected the drug almost immediately.
Shion proceeded to channel the entity known as Ira, killing all sixty-two staff and destroying the whole of facility Z-13. The last casualty was Agent [REDACTED], whose file was in the facility records and traced in its entirety by Nazuki.