Kate is a slightly short and slim girl with chest-length scarlet-orange hair that is tied in two low pigtails by burgundy ribbons where it is styled in drill curls with bangs swept to the left side, green eyes that has long curlicue-like eyelashes, thin eyebrows and a normal bust.

Kate wears the standard female school uniform without stockings or socks.

While Kate shows her cruel and sadistic self in doing so, she is a ruthlessly manipulative and shrewd girl who acts to make gains at the expense of others. A sinister character who displays intelligence and cunning throughout the series, Kate has proven a dangerous enemy to anyone who crosses her.

Ultimately, Kate has been shown to put indomitable effort into any task she sets upon herself which Mari praises by saying that she is a strong-willed person & hard-working. The kindness Kate shows to those who she considers friends is strong, as shown with her close relationship with her loyal aide and best friend from middle school Risa Bettou.