A blind anthropomorphic dog who is Beta's companion. She is very harsh, rude, blunt, and insensitive but is very kind, compassionate, and understanding. She's also very hissy whenever she enters a thought process of superiority. Lucy has a tendency to lose interest easily and isn't much of a fan when it comes to being outdoors and hanging out with others except for Beta. After taking on the Burden of Fuego, she lets Beta know that she's almost proud of him before finally transforming into sparkles. After bringing the first sunlight, Lucy reminds Beta that he's still her comrade.