Sonoko Suzuki, daughter of the wealthy Suzuki family, attends Teitan High School. Her family includes parents Shiro and Tomoko Suzuki, sister Ayako, and uncle Jirokichi Suzuki, noted for his pursuits of the phantom thief Kaitou Kid. She shares a long-standing childhood friendship with Ran Mouri, marked by mutual loyalty despite their different backgrounds. Sonoko's personality blends impulsiveness, romanticism, and occasional jealousy, especially when Ran unintentionally attracts male attention. Before her committed relationship with karate practitioner Makoto Kyogoku, she actively sought romantic partners through methods like wearing alluring attire or making chocolates. Though committed to Makoto, remnants of her flirtatious tendencies occasionally surface. In *Lupin III vs. Detective Conan: The Movie*, Sonoko arranges for Ran, Kogoro Mouri, and Conan Edogawa to accompany her to meet Italian pop singer Emilio Baretti at his hotel during his Japan tour. They encounter a police investigation into a death threat against Emilio. Later, during an unscheduled trip to Tokyo Skytree with Ran and Emilio, Sonoko helps rescue them when a strong wind nearly blows them off the structure, demonstrating her quick response. Conan sometimes uses Sonoko as a proxy for deductions, leading her to adopt the self-proclaimed title "Deduction Queen Sonoko." She is also a devoted fan of Kaitou Kid, cheering for his successes despite her family's efforts to capture him. Her family's prominence involves her in high-profile events, like their treasure exhibitions targeted by Kid.