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.
Genius Bonus: The name Otto Carius can be read in the German textbook under Taki's words. He was a German tank commander during World War II who reputedly destroyed more than 150 tanks. It's pretty cool, even if the world of the manga isn't the real world so...
Iron Woobie: Taki. His situation is gut-wrenching and his devotion to his country and his people is really admirable.