Who finds Nick and Marta in Mrs. Starch's house?

The correct answer is Twilly Spree. In the context of the story, Twilly is portrayed as a character who is not only adventurous but also proactive in seeking out Nick and Marta when they find themselves in a precarious situation at Mrs. Starch's house. His presence brings a mix of energy and complexity to the narrative, emphasizing themes of friendship and loyalty. Twilly's initiative in locating them showcases his character development and highlights his role in the story as an important ally for Nick and Marta.

The other characters, while integral to the plot, do not take on the role of finding Nick and Marta in this particular instance, which is a key detail in the narrative’s progression. Each character brings unique attributes to the story, but only Twilly actively pursues the search for Nick and Marta, leading to significant interactions that move the plot forward.