Calculus Kirameki is Algebra Kirameki's long lost sister who is abandoned by her parents a long time ago. She became an ojamajo just like her older sister.
She has black hair formed up in medium-length ponytail as well. She has her red ribbon. She has light red eyes. She wears her glasses just like her sister, and she has a red blouse with her light red skirt with buckles, and her brown loafers.
Calculus Kirameki is a organized girl with filled happiness that she gave to sister all of the time. She can be identified as kawaii, or either cute.