Who is Mr. Leonard from Welcome to the Monkey House and what is their importance?

Mr. Leonard is Paul's father. He is impatient with Mrs. Leonard, who he thinks treats Paul like a baby. He admonishes her for speaking too loudly—the neighbors will hear—and is exasperated with her nervousness at leaving Paul alone. He thinks Paul is old enough to take care of himself. He tends to be a bit sarcastic and generally short tempered. When the Leonards get home from the movies, however, he is clearly happy to be home and loves his son. He and his wife undress Paul tenderly and are anxious to hear how it went.