Setsuna is described as chatty, confident, and extremely provocative and talkative. She is one of the few students in Class 1-B that does not bear any apparent hatred to Class 1-A.

As shown in the Joint Training Arc, Setsuna is a wily and thoughtful girl with great aptitudes at leadership and cooperation. She is careful, concerned and attentive. Her attitude is different in combat and non-combat situations, having a more dirty and serious disposition when in the midst of battle