Final answer:
Based on the provided excerpts, there's no clear secret revealed by a character named Grace. Additional context is required to answer the question accurately.
Step-by-step explanation:
The student appears to be asking about a revelation made by a character named Grace at the end of a novel or story. However, based on the excerpts provided, which are from different texts and contexts, there is no clear answer as to what secret Grace reveals at the end. To provide an accurate answer, more information about the specific text in question would be needed, or alternatively, a relevant passage pertaining to the character Grace and the secret revealed by her should be provided.