Catherine is generally a upbeat, cheerful, eccentric, carefree, enigmatic and bubbly woman whose initial physical appearance and personality are meant to mirror what Vincent is searching for: a free soul. Freedom defines her entire attitude and feelings towards life: she's impulsive and resists commitment. This is demonstrated by the fact that she works with Mutton to corral men into the Nightmares "on a whim". Despite being a succubus, Catherine isn't entirely cold-hearted — in the novelization