Darcy is a member of the Trix, a trio of witches, of which she is the most intelligent. Devious and manipulative, Darcy uses darkness, illusions, and hypnotics to confuse and control her opponents. Darcy demonstrates a sadistic personality but one that is more controlled as she is the least (openly) aggressive of the three. She seems calmer and more competent compared to her sisters and is also good at discovering others' weaknesses to exploit them later.