Curley is the son of the ranch owner, Mr. Curley. He is a young man who is full of energy and has a bit of a temper. He is also very competitive and likes to show off his strength. Curley is often seen picking fights with other ranch workers, and he is always trying to one-up them.
Handy in mice
Candy says that Curley is "handy in mice" because he is good at killing mice. This is a valuable skill on a ranch, as mice can contaminate food and spread disease. Curley takes pride in his ability to kill mice, and he often uses it to show off his strength.