Natsuki appears to be a brash, blunt, cranky and bratty girl at first, but she has a cute, softer interior, causing Monika to class her as the real-life embodiment of a tsundere. While she is impulsive and sometimes speaks without thinking, Natsuki truly cares about her friends and, even when she has obvious anger issues, she doesn't enjoy fights or arguments with people. Over the course of the game, it is shown that she worries about Yuri, and, on one occasion, she gives the protagonist a note asking him to help Yuri, fearing that if she spoke out then it would cause more arguments. Natsuki is very stubborn and has a hard time expressing how she feels and what she wants. When repeatedly challenged, she often becomes awkward and tongue-tied, then aggressive, and then simply bursts into tears. Natsuki is also shown to be less pushy and more relaxed when she is outside of school, as mentioned by the protagonist when she visits his home. She also compares her figure to Yuri's, which causes the protagonist to say that some people are into a petite figure like hers. She is also known to be skilled in baking, as she made cupcakes for when the main character first arrived in the Literature Club, and for the festival.