Éclair Martinozzi is a 14-year-old female Knight of Biscotti, as well as the captain of the Imperial Guards unit directly under Millhiore's command. Having been training as a knight since her childhood, she is proficient in dual-sword wielding. She bears great admiration toward Millhiore and holds her with utmost respect. She is always troubled by Cinque's "ignorance of the ways of the world," and has a very serious attitude, albeit stubborn. she plays the role of the straight man to Cinque's funny man. A running gag is that she has a complex about her ears, as they are smaller in size and droop down compared to other characters'. She is also tsundere toward Cinque and can unleash shockwaves from her blade.