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. As events unfold, this may be a front of maturity, due to her assumed role as the leader of SEES. Her Persona Arcana is the Empress, which fits with the "motherly/older sisterly" role she plays in the group.

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. Akihiko Sanada is an exception to this, as the two are good friends and have known each other since junior high. Eventually, she becomes more familiar with the other SEES members and refers to Yukari Takeba on a first-name basis, and the others' on occasion. Mitsuru is also very insistent with the team keeping their grades up, going so far as to sign them up for summer classes behind their backs. Mitsuru is also outspoken and has zero tolerance for prejudice. For example when the female protagonist is elected leader and Junpei Iori is annoyed because "he's the only guy in the group," Mitsuru sternly tells him that "Whether one is a man or woman doesn't factor into it. The responsibility falls to those who have the gift. And let me add, if you ever say or do anything to condescend to her because she's a woman..."

Despite her often getting annoyed at Akihiko's eagerness to fight, Shinjiro Aragaki claims in Persona Q that she "enjoys fighting just as much as he does, if not, more."

No I do not have a preference, but I think a mature voice would be the way to go