Sheryl Rainsworth is Sharon's grandmother and the head of the Rainsworth Household. Like Sharon, she appears to be cheerful most of the time, yet has a dangerous and often intimidating atmosphere about her, even though she is bound to a wheelchair. She possesses quite a presence, much to the dismay of people like Oz and Rufus. She is known to be childhood friends with Rufus Barma, and it was also revealed in one of the omakes that she was his first love (though she has rejected him multiple times since).
Sheryl controls the Owl chain for the Rainsworth household, though it has yet to be seen. (wikia)
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