Ms. Sevoy is the librarian at Hogwarts school in The Life and Times. Her character seems to be similar to Madam Pince, the canon librarian at Hogwarts in the Harry Potter series in their similar overprotectiveness of their books and disdain for rowdy students. 

Ms. Sevoy also appears to be an anti-feminist, as evidenced by her advising Alice Griffiths to "forget this Auror nonsense" and marry a Pure-blood wizard.