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.
Anvilicious - Violence is bad. Very very bad. Did we mention that it's bad?, because it's bad, very, very BAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAD! (it's also bad).
Why is Rushuna's gun so heavy? "So I can measure the weight of a life" as she puts it. *ahem* SUBTLE IS IT NOT?!
Yajiro's swordman skills are made even more apparent in the manga, where he overpowers his opponent who was using a rocket propelled katana. This means that if he had a mecha, he could quite possibly be the one of the few people who could best Zengar Zonvolt in battle.
Crowning Moment of Heartwarming - The very end of the manga, when the narration reveals that after Rushuna and Yajiro returned from her homeland, they got married. It becomes even more adorable when the narration ends, saying that Rushuna was "smiling like a sunflower."