>>9798715not to mention Marine and Aqua are super close
that being said the >company mandated shitposts are annoying, but it is likely they got emails saying "hey, we decided to form a unit involving you four. are you in?" and obviously they would all be interested
plus Aqua's unironically a big pull for this type of thing. I wouldnt be surprised if it's to shill something like the curry meshi thing
id prefer if it was just an idol unit to promote hololive itself but I can see it being for pachinko machines or something like that
