Final answer:
The characters King Arthur, Sir Lancelot, Sir Gawain, and King Uther are from Arthurian legends and not typically part of the Robin Hood story.
The Robin Hood tales often include criticisms of the upper class, which may be thematically similar to elements in Arthurian legends. To answer the question accurately, more context from the Robin Hood story being referred to is needed.
Step-by-step explanation:
In the Robin Hood story, the bride was not about to marry King Arthur, Sir Lancelot, Sir Gawain, or King Uther as these characters are from Arthurian legend, not from the Robin Hood tales.
However, the mention of criticism towards the upper class suggests a thematic element often found in Robin Hood stories, where the protagonist stands against the injustices perpetrated by the nobility. If we were to draw parallels, the criticism might reflect on similar themes depicted in the stories of the Knights of the Round Table, such as those involving Sir Lancelot.
Since there are no specific details that indicate a bride about to marry one of the Arthurian characters in the context provided, it's important to go back to the source material or further instructions given by the teacher to properly answer this question.