I have a dream that one day Negom will draw Rikka going down on Makoto for once. Seriously, is like Rikka is such a pillow princess and Makoto is addicted to the other's pussy or something.
... Well, this is a novel ship (pun unintended). There's nothing that really connects any of them to each other beyond being shipgirls of the Imperial Japanese Navy that served during WW2, is there?
^ About the closest I could easily find is Suzuya playing escort for a carrier group that included Zuikaku at least once (Eastern Solomons) and apparently being en route to participate in the unsuccessful raid where Sendai was sunk (Empress Augusta Bay)... yeah, doesn't look like much to go on. : /