Final answer:
Darrow kidnaps Mustang from House Minerva to form an alliance which is a key plot element in the novel 'Red Rising,' facilitating the advancement of the story and character development.
Step-by-step explanation:
The character Darrow from the novel Red Rising kidnaps Mustang, who is a member of House Minerva, for the purpose of forming an alliance. This strategic move is pivotal in the storyline as Darrow seeks to gain a powerful ally in his fight against the oppressive society structured by a strict class hierarchy. Mustang, being a clever and influential character, becomes an essential part of Darrow's plan to lead a revolution within this dystopian world. Kidnapping her serves as a catalyst for significant developments in the plot, character dynamics, and the overarching theme of rebellion against tyranny.