I think what makes this funnier is that Swimsuit Nero is the one with a more KanColle-esque design (her 2nd and 3rd Ascension comes with Kanmusu-like rigging cannons), compared to Swimsuit Artoria
Artist commentary bellow the post: "inspiration from right to left: han dynasty tomb figure, tang dynasty tomb mural, yulin cave 25 mural, the night revels of han xizai scroll, peony pavillion, farewell my concubine"