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.
Harmless Villain: Loki seems to spend most of the first several novels twirling his mustache and declaring that everything was going exactly according to his plan because Gaia doesn't get along with her schoolmates, which is even sillier when one realizes he didn't have anything to do with that. He gets scarier later in the series, but since his nefarious schemes tend to involve the international terrorist mastermind pretending he manipulated Heather and Josh into having sex, his menace is somewhat undercut.
Moral Event Horizon: Harmless Villain he might have been, but Loki's murder of Mary Moss falls under this. He basically killed her just because he didn't like the influence she had on Gaia.