For special items like Warship Girls that awaken and become spirits, their appearance will usually follow the looks of the being who granted them Spirituality. Generally that's one of two people: either their creator, or the Master who really cherishes them. Of course, a lot of the time those two can be the same person.
Dorothy used to be both creator and item owner. Her Dream Fleet in "World of Warships" was all personally built by her, and she herself served as the fleet's Admiral. So most of her Warship Girls wives all more or less looked a bit like her.
That said, once beauty reaches a certain level there's bound to be shared traits, and with her Eye of God, anyone who resembles her by even one or two parts out of ten is already a peerless mortal beauty. Most of her Warship Girls wives only manage three or four parts of resemblance. Except for one ship that's rather special.
