Satsuki is a friendly girl to those in her peer group but distrustful of those who aren't such as when she immediately singled out the boys as being the prime suspects of Kei Karuizawa's missing underwear. This is also seen in episode 4 when she believes Ken should've been expelled due to the trouble he caused to the class without getting to know the full picture.

In the light novel, she is said by Kanji Ike to have an "ugly" personality, although this was possibly due to the arguments they sha