ryuuhou kai (kancolle)
Ryuuhou's kai from differences from her base form include: clothes turn teal, her flight deck significantly increases in size and now features a camo design. The necklace is now absent, her tie has been tied differently (now like Yuudachi Kai2) and she gains a radar hairclip.
This tag implicates ryuuhou_(kancolle) (learn more).