I see bikini pics of Musashi, Akashi and Ryuujou for sure, not sure about the rest. The American flag bikini might be Iowa, or it might be Saratoga.
If you mean the one in the red bikini next to the Akashi one being Ryuujou, judging from the twintails' length and thickness it's more likely to be Zuikaku.
If you mean the one in the red bikini next to the Akashi one being Ryuujou, judging from the twintails' length and thickness it's more likely to be Zuikaku.
That is Hamu's Mikuma, Bismark or Prinz under Ryuujou's left hand. The pink bikini doesn´t have clear hints to intentify the character.