These are what we call the 'YMMV items.' Things that some people find in this work. We call them 'your mileage might vary' because not everyone sees these things in the same way. This starts discussions in the trope lists, a thing we don't want. Please use the discussion page if you'd like to discuss any of these items.
Hilarious in Hindsight: This line by Jun, about a military recruitment video with fanservice: "It's an era where warships and brave veterans transform into moe characters." Well then, Hello Kantai Collection!
Ho Yay: Ell/Putina, Yukino/Putina, Kuon/Putina, and and Remi/Yukino.For the Guys, it's Morita/Jun. It's the bad ending if Jun can't decide on a girl, and Morita makes his move.
Memetic Badass: None of the characters in game are this, but Vladimir Putin's status as one is probably why Putina is in the game and does some of the things she does.