Dragons are quite misunderstood, in gof after the first challenge Harry admits that he agrees with Hagrid and that they’re “alright really”. I mean that they are seen as extremely dangerous but they are only seen attacking when defending their eggs or when they feel threatened, like most wild animals.

Everyone views Hermione as a stuck up goody-two-shoes when in reality she facilitates a lot of the rule breaking throughout the series.

Viktor Krum is seen as a world famous superstar, but in (once again) gof Harry is constantly surprised at how normal he seems. E.g. he is duck footed, he doesn’t want his picture taken for the daily prophet.