Kaoruko Sazaki is a supporting character from the anime series Gundam Build Fighters. Known for her competitive spirit and sharp wit, Kaoruko is the younger sister of Susumu Sazaki and is often seen participating in Gunpla battles. She is a skilled builder and pilot who uses her intelligence and strategic thinking to challenge the main characters. Her rivalry and interactions bring both tension and humor to the series, making her a memorable and dynamic presence in the story.