Momo is a very intelligent, dedicated person who acts as a natural leader. She is generally very level-headed and calm, even in dangerous situations, but she isn't above falling into panic. Despite Momo's serious nature, she can get roped into silly situations with the rest of her class such as cheerleading, although she rarely expresses enthusiasm in doing so. Also, when she shows her excitement (usually towards passing time with her classmates), she becomes quite upbeat and adorably "bouncy", adding a bit of comedy to her character.

While she can be very blunt with her explanations about the mistakes and situations of others when asked, this is because Momo wants her fellow students to improve and become great heroes, proving to be very caring and empathetic. As such, Momo is quite willing to help her classmates study with her, also seeming to deeply enjoy being in a teaching position.     

While acting confident in her abilities, Momo had the tendency to compare herself to other people such as Shoto Todoroki, and believed them to be better than her, which made her self-esteem fall to the point of having inner conflicts with making choices. However, Momo has become much more objective and confident thanks to Shoto's encouragement, learning that all people have different skills and priorities, as well as all beings are incomplete as they need their motives to complement themselves; in her case being a hero.