Zuikaku's kai form, the difference between this and base form are following:  Zuikaku Kai's skirt becomes brown; her top is now a bluish grey; her muneate, flight deck, arm bracers and her quiver gain a geometric camouflage pattern. The main difference between Zuikaku Kai and Zuikaku Kai Ni are: differing camouflage pattern on her muneate, Kai Ni having 2 tatsuki's and wielding a full length yumi.
zuikaku kai (kancolle)