In "Written in My Own Heart's Blood," Diana Gabaldon uses a vivid metaphor to describe a character, likening her to a sofa rather than a graceful horse. This comparison emphasizes her broad build and rounded shape, suggesting comfort and perhaps a sense of awkwardness rather than elegance. The imagery evokes a playful tone, illustrating the character's physical presence in a way that is both humorous and relatable. The phrase conveys a sense of warmth and safety associated with the character, as one might feel when resting on a comfortable sofa. Gabaldon’s choice of words paints a clear picture that invites the reader to visualize the character while also hinting at her personality traits. Overall, the description sets the stage for understanding her role in the narrative and the dynamics she brings to the story.