In a recent post, Zara Altair examines the importance of supporting characters in a mystery novel. “These characters, often underestimated, play pivotal roles in advancing the plot and in adding depth, tension, and authenticity to your story,” she says. “Whether it’s the sidekick who offers comic relief and a sounding board for the protagonist, or the enigmatic suspect who keeps readers guessing, supporting characters are indispensable in crafting a gripping mystery.”
Supporting characters add complexity, alter the emotional dynamics, and prompt action and reactions. They also add depth to your story world, helping to create a fully fleshed out milieu, and add depth to your protagonist. “Through their interactions—whether they be conflicts, alliances, or casual conversations—these characters offer insights into the protagonist’s values, fears, strengths, and weaknesses,” Altair explains. “These characters bring out different sides of the protagonist, enabling readers to connect with them on a deeper level and thus become more invested in their story.”
In a mystery novel, supporting characters enhance the plot. Your suspects obscure the truth and send your sleuth chasing red herrings. Your sidekick may discover a vital clue or rescue your hero from danger. A witness may provide important information or a contrasting perspective on local events. A colleague or family member may unintentionally introduce obstacles that hinder your detective’s work, or find themselves in trouble. All of this helps build organic tension and suspense. You don’t need to rely solely on your villain to provide conflict. “By using supporting characters to introduce unexpected developments, create red herrings, and elevate the emotional stakes, you craft a mystery that is intricate, compelling, deeply immersive, and suspenseful,” Altair adds.
Backstory and motivation are key to creating great supporting characters, Altair says. You should pay as much attention to their personalities and histories as you do to any of your main characters. While it might not show directly on the page, knowing and understanding your supporting characters will help you bring them to life and put them into direct conflict with your sleuth. If your supporting character will appear only briefly, consider giving them a memorable quirk or interesting way of speaking, so they will stick in your readers’ memory.
