Deuce is loyal to her duties in Class Zero. She is kind-hearted and good-natured, though she can also be stubborn. When she sets her mind to something, she is going to get it done. Normally, Deuce treats everyone she meets with respect and kindness, making concessions to avoid conflict, but once she makes up her mind she refuses to budge. She hates dark, dank places. She is said to be 'scary' when angry.