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: Kurogane Communication
Tearjerker: Increasing in frequency and intensity as the series progresses.
The Scrappy: Spike seems to be meant as The Heart of the group, but his neurotic behavior actually makes the rest of the group appear more human in comparison.