Hiccunzel

Within the big four, Rapunzel and Hiccup seem to have the most similar personalities.While Jack and Merida tend to be more fiery, Rapunzel and Hiccup are calmer and rely more on their intelligence than a special ability or power.

They both appear to be animal lovers (fans have pointed out the parallels between Hiccup's interactions with Toothless and Rapunzel's interactions with Maximus) and generally kind-hearted individuals. In Harry Potter AUs, Hiccup and Rapunzel are both interchangeable between Hufflepuff and Ravenclaw, because they both have characteristics that could suit both. Hiccunzel, though not the most popular ship, does also exist in the RotBTD crossover.