So you didn’t really know that sirens are Eagle Union warships? Seriously? It seems what you know is outdated. Let me tell you this spoiler that you didn’t know the 'Superimposition event was released' in that game. Event players saw what the Alpha timeline/original timeline is like; it’s a 21st-century setting that already reached the hologram tech age. In that event, ships like Yorktown II, Hamman II, Northampton II, Langley II, and Hornet II were released. The event shows that ship girls fought the modern Eagle Union Navy in training in New York Bay where they were outmatched because of guided munitions but could easily dodge them but It was nearly impossible to evade because their guided and it's also nearly impossible to evade when the enemy used saturation attack of missiles and torpedoes their air assault was useless because modern warships rely on formation and the combined use of defenses. Still, they won because they could rip off non-Kan-Sen armor. The story continues that somewhere in Bermuda on the island named Samos (Somerset island Bermuda), it tells that the whole island is an advanced research facility and it’s also the home port of the sirens. At that time, sirens were never called sirens but had their own 'acronym' like 'KAN-SEN.' They were actually called 'ANTI-X' then, created for Global Maritime Security. The 'ASHES' group of Meta Enterprise was originally named in the past as 'FLARE FLEET,' also focused on Global Maritime Security same to ANTI-X.
