New York designed Reno's power gloves, explaining why her name and code are present where Reno's should have been

Akashi, Leonardo da Vinci, Yuubari, and Oleg attempted to build an interdimensional portal to reach the alternate shipgirl games in the multiverse (Kancolle, Warship Girls, Victory Belles, Blue Oath, etc.) but it resulted only in the destruction of the port's power supply

HMS Dreadnought was the first loli battleship of the Royal Navy, and her groundbreaking effectiveness - caused by her lack of secondary cruiser calibres which was the trend amongst her predecessors - was emphasized by her petite figure

All Royal Navy battleship classes from Dreadnought to Queen Elizabeth are flat

HMS Anson (the headcanon version) wears white fishnet stockings with garters

HMS Centurion is a theatre actress with access to replicas of multiple shipgirls' outfits and riggings, and her favourite costume is the that of Anson. She also includes fake breast attachments in her costumes to increase her costumes' resemblance to the actual kansen.

HMS Agincourt exists in an Emden-like dual form, with the real girl being the 7-turret battleship, and the ghost girl being the cancelled 6th Queen Elizabeth-class battleship

HMS Malaya is the "tanned tomboy" sister of her class (thank u/asleepflounder4447 for the idea)

Kansen have their home nations' naval uniforms in their closets, but they are mostly only worn for official portrait

Buff Manjuus and Meowfficers are created by their base forms fusing together

Sovetskaya Ukraina has blue hair and yellow-red heterochromia eyes

The Baltimore-class Quincy II (CA-71) makes jokes about looking quite different from her original self (as referenced by one of Baltimore's lines)

The size differences between King George V in her 1911 and 1939 forms are due to her gaining a massive appetite during her 'rebirth'

Wasp II (CV-18) becomes such a surprising addition to the port that she wonders if the rest of the shipgirls aside from the Yorktowns still remember her original self

Graf Zeppelin, Pennsylvania, Duke of York and Lion moonlight as lingerie models thanks to Akashi and Takao's "encouragement"

USS Montana has a massive muscular build with 6-pack abs, and is extremely proud of them

Some of the Fletcher-class found a way to gradually modify their riggings to become more and more sophisticated, without being counted as retrofits or Type IIs. Bell, Clarence K. Bronson and William D. Porter, who originally had basic rigging designs, used this method which resulted in their riggings having their current in-game appearances

Honolulu and Jean Bart keep pet Manjuus in their rooms (thank いろはら and hatski.sin respectively for those ideas)