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.
Foe Yay/Ho Yay: Many people interpret the Bokor's obsession with Maeda this way, which is only exacerbated by a cryptic dream sequence he has about it which implies that they knew each other when it was human, and the fact that it knows his name, even though in-universe it's explained that Maeda is simply the first person it's encountered who also meets the conditions—whatever they may be—to also become one, and it's just spreading the infection. Also lampshaded by Yoshioka:
Yoshioka: In other words, "Maeda-kyun is the only one for me <3" in a way.
Fridge Brilliance: Why is no one aware of how the Bokor knows Maeda's name? Every time it revealed this fact, it had just used its sound blast attack, so whenever it said anything, everyone probably only heard ringing.
They Plotted a Perfectly Good Waste: Many people thought Shinpei was doomed as soon as it turned out that he refused to kill his zombified son, and instead chose to keep him restrained. However, a good amount of character development and a clear loyalty to his friends has kept him alive.