Briar's defining characteristic is her never-ending hunger for blood, with her instincts drawing her to kill both her allies and enemies indiscriminately so she can eat them. After developing independence as a result of her imprisonment, she became excitable and carefree, always displaying a childlike sense of wonder. She has more control over her hunger and is more open to befriending others, though she is willing to unleash her hemomanic instincts if she needs to.