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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.
There are also lots of pairings including Hevvin when he's in his human form.
The artist did a 'Ask the Characters' segment on Deviantart in which one whole page was pairing based. Harv kissed Finn, then later Hevvin is tricked into making out with Finn. Harv beats him off with his sword.
And now Rhodri has a crush on Finn, though he doesn't realize Finn's a guy.
Apparently Olf just scares the crap out of the characters by just standing and staring at them. I don't blame them.
Paranoia Fuel: Once Finn reveals to Harv that he's constantly watching him via his mother's crystal ball when they're apart, Harv becomes quite paranoid that he's being watched by him while doing personal things, such as bathing.