>>2723484They're called Rensouhou-chans. They're more like Familiars than Robots. It all goes back to her love of speed. The Rensouhou-chans are self propelled and are just as fast as she is. This means she doesn't have to carry them herself into battle as to not weigh her down and thus slow her down as well. Though she does carry them into battle, they separate from her and move in the water according to her orders thus improving speed and mobility.
Shimakaze isn't the only Kancolle with Rensouhou-chans either. Amatsukaze had them too.
