I see her more as being a manifestation of the lost IJN Kiso, a Kuma class light cruiser. Though this is meta as it is based on another game...
I think if Murasa were to be the manifestation of a famous warship, she would most likely be the USS
Enterprise (CV-6). Said ship was dubbed the Grey Ghost due to her reputation of being an unsinkable ship as well as the fact that the Japanese somehow often erroneously thought that they had managed to sink her. Enterprise's planes had also sunk the greatest tonnage so far of any US naval warship in battle, if my memory serves me correctly. After the war, she was sent to the scrapyard following failed efforts to have her preserved as a floating museum, so she is effectively a legend now.
Actually, Enterprise wasn't totally scrapped. A few of her small parts have been preserved and are on display, among them one of her anchors.
On an unrelated note, sometimes I like to imagine that the Prismrivers are three of Bach's prematurely dead children.