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.
Tohru, at least initially, after his proper introduction into the storyline, specially after the reveal about Yuji and what he did to both Yuki and Tohru. This is later fixed by actually making him properly unsympathetic towards the end of the series when he goes full Yandere.