This is curley. He isn't the nicest guy when we first meet him. He seems like he wants a fight which we later o find out is the case. 'what you lookin' at?' This is quite aggressive and the tone of his voice that comes across
This is candy. He had an accident on the ranch in which he lost his hand. This left him unable to work on the ranch, but the owner said he could clean the ranch. In the book we see him as a nice and wise guy.
This is Lennie. He is an extremely strong human, who isn't the brightest of all people.