The grave was dug the moment she sent Minikagi to capture Grim. Now she's ready to lay in it. I'd say Impending Doom or Told You Not To Do That, though Told You Not To Do that is probably more the next strip than this one.
But they still feature details alluding to their respective animals in their overall designs. Mephisto's race is gonna be a real surprise if it's ever revealed, cause there's nothing to guess it on from his appearance except for how white he is.
There is one hint with Mephisto- his name and connection to Faust. "Faust" is the name of the play by Goethe, and relates to two characters- the eponymous Faust and the demon Mephistopheles. The race with "Demonic" connotations in Arknights is Sarkaz. In this case though, Faust was/is Sarkaz IIRC. In which case, I would wager Mephisto is either Sarkaz, Human, or something else entirely.
Yeah, the inability of the battleship to get within striking distance. Carriers lose by every metric, save two.
Doesn't matter how many guns you have or how big your guns are. After all, if you cannot even get close enough to land shots, you might as well have a glorified parade float.
And that's kinda the whole point here. Anything that isn't human in Gensokyo is kept alive by fear and faith, for youkai and gods/goddesses respectively. To maintain that fear in the human heart, Youkai eat human, just not from the village but is supplied by Yukari. They don't need to eat human to survive, but eating human is a way to sow fear in other human which is what keep them alive.
... Maybe I'm missing something here. But how in the hell is eating random outsider humans that the villagers have no connection to supposed to provide fear from the villagers? The villagers are not the ones going missing, they're not the ones vanishing into the night, their bones aren't gracing the lairs of youkai. The other example (WaHH) makes more sense. If you need fear/ faith, and you have supernatural powers that the people around you can't explain away, the easiest way to get the former is probably to just use the later.