Cuff is a young witch who first appears transformed into a small white bat during a snowstorm, collapsing from the cold before receiving aid from the main characters. Her background is marked by profound isolation and loss, as she is the child of a human father and a witch mother, making her a half-blood who is not truly accepted by either community. During the brutal witch hunts, both of her parents were killed, forcing her to learn to survive on her own from a young age. This traumatic past and her mixed heritage have made her a wanderer, unwelcome in human society and often shunned by other witches, which also hindered her formal magical education.

In terms of personality, Cuff presents an interesting contradiction. She has a playful, mischievous, and energetic demeanor, often acting on impulse rather than careful thought. According to her close friend Zain, she has a tendency to act first and think later, and she herself admits that she does not always consider the consequences of her actions. Despite an outward appearance that can sometimes seem cold or serious, she is genuinely warm-hearted, kind, and always ready to help her friends. She lacks confidence in her own intellectual abilities, dislikes studying, and prefers to let Zain handle important decisions, though she possesses a strong determination and a courageous spirit when it matters most. Her immaturity is also shown through a childlike belief in figures like Santa Claus and a tendency to respond to teasing or embarrassment with dramatic, impulsive actions, such as turning into a bat and fleeing out a window.

Cuff's primary motivations stem from her search for belonging and her loyalty to those she trusts. Initially distrustful of humans due to the trauma of losing her parents to witch hunters, she gradually overcomes this prejudice through her friendship with the Duke and his maid, Alice. She is driven to protect the few close relationships she has, particularly with Zain, and to find her own place in a world that often rejects her. Her role in the story is significant; despite being unable to break the Duke's curse herself, she becomes a valuable ally. She uses her magical abilities to assist the main pair, such as using her fire magic to help locate a lost heirloom for Alice. She also serves as a guide to the hidden world of witches, leading the Duke and Alice to the Witches' Sabbath in their quest for answers. She and Zain are performers at the circus known as the Gemini, which becomes a central part of their life together.

Her key relationships are central to her character development. Her bond with Zain is the most important. They are childhood friends who have supported each other through their difficult pasts, and while she initially rebuffs his flirtatious advances, she eventually develops genuine, deep affection for him, and they become an official couple. Zain acts as the voice of reason to her impulsiveness. She also forms a close friendship with the Duke and Alice, becoming a trusted companion in their journey. This relationship represents her overcoming her distrust of humans. Cuff also receives help from Rob, another character in the series, who helps her learn to read and write, addressing the educational gaps caused by her difficult childhood. Her interactions with the jealous Viola are often comedic, with Viola viewing Cuff as annoyingly attractive.

Throughout the story, Cuff undergoes notable development. She moves from a state of lonely survival and distrust of humans to becoming a trusted friend and key member of a found family. Her relationship with Zain evolves from a partnership of necessity into a sincere romance. She also grows in her practical skills, using her magical talents more effectively and, with help, overcoming her struggles with basic literacy, which allows her to navigate the human world with greater confidence. Her character arc is defined by the themes of overcoming prejudice and finding a sense of belonging not through her bloodline, but through genuine, heartfelt connections with others.

Cuff possesses a couple of notable abilities. She specializes in fire magic, demonstrating clear proficiency with flame-based spells, which she uses for both practical tasks and, on occasion, to playfully threaten Zain when he flirts with others. Her most distinctive power is the rare ability to transform her body into a small white bat.