Hermione granger, the diligent gryffindor student, carries a book under her arm. Her highly intelligent cat crookshanks™ remains faithfully at her side. Hermione is one of harry's best friends, a gryffindor student, and is intelligent and diligent. Her quick thinking and impressive magical abilities often help harry and ron on their adventures. Here she is shown with crookshanks, her very intelligent cat, who also often helps the trio