Bentley, the brains, is the deuteragonist of the Sly Cooperseries. He is a male turtle with green skin and black eyes which are covered by glasses, which he needs due to being nearsighted. He is best friends with Sly Cooper and Murray, and is a member of the Cooper Gang. His significant other and rival is his ex-girlfriend Penelope.
Bentley first appeared in Sly Cooper and the Thievius Raccoonus at the age of eighteen. His current age is unknown, as he was 21 in Sly 3: Honor Among Thieves, but an unknown amount of time passed between that and the fourth game. At the end of Sly 2: Band of Thieves, Bentley lost the use of his legs, and afterwards uses a highly–modified wheelchair that actually makes him more mobile and powerful than he was while able to walk.