Saki is stated to be a cheerful and energetic girl. She is also an emotional, naive and forgetful girl. She excels in sports and can be openly aggressive against anyone, mostly Mukai Naoya, whose actions are a bit too much. Like most female protagonists written by Hiroyuki, Saki is quick to anger, & has a frequent tendency to (comedically) knock Naoya unconscious with boxing-punches or German-Supplex reverse-throws whenever he accidentally lights her dangerously short fuse. Saki is very insecure about her body, particularly about her breasts size. Though it was implied she was a forgetful girl, it was further emphasized that she was quite absentminded when she even forgot the things she set out to do despite her seemingly great conviction.