Design & Development[]
The Siren II is supposedly the successor to the original SL-8 Siren, which serves the same role in the third movie as it's predecessor did in the manga. It is an aquatic labor manufactured by Schaft Enterprises Europe, though what it improvements it has over the origin Siren is unknown. It has multipurpose manipulators batteries on both arms, two aqua jet units for propulsion on its back, and a spare battery pack on the side of its abdomen. All of which to increase it's work efficiency under water. It appears disassembled for the majority of the movie, No. 13 wearing it as a cowl after Shinichiro Hata and Takeshi Kasumi encounter it at the maintenance base.