She is easily agitated, be it about unfavourable situations, scary things or her stubborn self.
It seems like she doesn't mind treating her sisters unfairly when it comes to things related to food.
This shows where during one scenario when she proposed to her sisters to share their cakes; suspected to sample all the flavours by Ichika.
Early on, Itsuki had a quarrel with Fuutarou, leading her to reject him as the sisters' tutor early on.
Despite their initial tensions, Itsuki is disturbed by the condition placed on Fuutarou by her father, and at first refused to disclose her first test scores, knowing that Fuutarou would be fired.
Catch a glimpse of her glutton personality with this detailed sculpt as she holds a meat bun in her right hand.