Mitsuru is calm, confident, mature, responsible, wise and very intelligent despite being a high school student. However, she may be interpreted as slightly arrogant, conceited, cold-hearted or overconfident.

Mitsuru has a streak of strict conduct. Per formal Japanese culture, Mitsuru is the only member of SEES who formally addresses her fellow club mates by their last names. Mitsuru is also very insistent with the team keeping their grades up, going so far as to sign them up for summer classes.