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.
YMMV: Nintama Rantarou
Angst? What Angst?: Kirimaru's parents were killed in a war, but except for one occasion, he was never shown to be grieving about it
The series in general is set in Japan during the time when there were wars between castles and villages. Despite this, the tone of the series is cheerful, and none of the characters are taking the wars (too) seriously.