Many of the Chinese and Japanese fans of KanCole believe that, the strongest wo-class in the game(with a flame just like the BRS in her eys), is the personification of the USS Enterprise (CV-6)
So notice the eyes of the wo-class in the other pictures of this series, it seems she is just that wo-class, namely the CV-6
And I think this part of lyrics maybe is to remind the fact
"Subsequent attempts were made at preserving the ship as a museum or memorial, but fund-raising efforts failed to raise enough money to buy the vessel from the Navy, and the "Big E" was sold on 1 July 1958 to the Lipsett Corporation of New York City for scrapping at Kearny, New Jersey." (from http://en.wikipedia.org/wiki/USS_Enterprise_%28CV-6%29)