Misery

Miss Misery (ミザリーを欠場) is a character in the spin-off series, Soul Eater Not! She is a housemaster of the girl's dormitory at Shibusen and is occausionally frightening to be around, but is helpful as well; Miss Misery is a strong, and capable fighter although she's somewhat insane. Her character is based off Kathy bates' portrayal as Annie Wilkes in the 1990 movie "Misery".

(Source: Soul Eater Wikia)