Éclair Martinozzi is a 14-year-old Knight of Biscotti and captain of the Imperial Guards serving directly under Millhiore. She's been training in swordplay since childhood and specializes in dual-wielding, making her proficient in combat. The character is known for her serious, no-nonsense attitude—though she can be stubborn about it.
Éclair deeply admires Millhiore and treats her with genuine respect. She's constantly exasperated by Cinque's complete obliviousness to how the world works, which sets up a lot of her dynamic with him. Fans often note her role as the straight man to Cinque's comedic antics. There's a running gag throughout the series about her ears being noticeably smaller and droopier than everyone else's, which bothers her more than she'd ever admit. She's also got a tsundere streak when it comes to Cinque, and she can channel her blade to unleash shockwaves in combat.
Content compiled by AnimeList.moe from publicly available sources.