At first, he highly opposed the marriage of Shrek and his daughter Princess Fiona. He even went as far as employing an assassin (Puss in Boots) to murder Shrek, to allow the handsome Prince Charming to take throne next to Fiona. This was most likely done because Harold doubted Shrek's love for Fiona. Eventually, Harold gives Shrek and Fiona his blessing at the ending of Shrek 2. His storyline is very similar to that of the frog prince, except it is only a reverse story (initially a frog who turned human). This is also similar to Shrek's character, a non-human species that falls in love with a female human. Donkey makes a reference to this in the end of Shrek 2 whenHarold has turned back into a frog from the Fairy Godmother's wand by saying, "...And he gave Shrek a hard time...