ryuuhou kai ni (swimsuit mode) (kancolle)
The bikini official alternate costume of Kantai Collection's Ryuuhou Kai Ni, as seen in post #4640606.
Her swimsuit at kai ni form consists of a white bikini, green sarong with a floral print (meant to reference her real-life camouflage color), brown straw hat with a whale clip, black sandals, and a single arm scrunchie. Note that this tag applies only if her sarong is green, the blue and red versions have their separate tags.
See also
This tag implicates ryuuhou_kai_ni_(kancolle) (learn more).