|Kanji||キャロル ･ オルストン|
|Relatives||Ferris Olston (mother)|
She is a British girl and is the daughter of a distant relative of Misaka. She is considered very beautiful and many ay she looks just like a doll. She is also quite wealthy considering her mansion she lives in, and that she gave Tomo three solid gold bars for her birthday. She often makes blunt remarks in a very casual manner even to complete strangers. She seemingly does not fear anyone including delinquents and Tomo's intimidating father despite being very physically weak. She is extremely poor in athletics and sports.
They are childhood friends, and according to Carol are engaged and have been married three times. Misaki, on the other hand, treats Carol like a little sister and often apologizes to other for her strange ways. Misaki is extremely protective of Carol and becomes very scary when he suspects that Carol has been hurt or compromised.
They are friends and Tomo looks up to Carol because of how girly she is.
Although they are often seen together, they can be very competitive towards one another. Carol finds Misuzu very interesting despite the fact that Misuzu can oftentimes be mean to her. Many of Misuzu's remarks that are meant to shock or hurt Carol are often either ignored by Carol or taken in a positive way. This, in turn, makes Misuzu feel defeated. They only truly get along when teasing or helping Tomo or Jun.