Kari can be a tad self-centered at times, occasionally sending others out to find her scoops to make reports on, even if it is dangerous or hazardous. She can also be a tad aggressive, showing to be willing to physically attack Yuma when she caught him dueling (though it is possible she was just trying to intimidate him).

Despite this, Kari genuinely cares for her little brother, and seems to be rather protective of him. She made a promise to her parents that she would do what she can to take care of Yuma, being told that he would rely on her for a long time. As a teenager, she seemed jealous that Yuma got more attention from their parents but has seemingly gotten over any animosity she may have had then. Also, Kari's car was a memento from her father, and she drives it with great care.