Sonny is a businessman who owns and runs a shop across the street from Sal's Pizzeria.
Sonny is married to Kim and they have one child. The family, who run a supermarket and grocery store opposite Sal's Pizzeria, are of Korean descent and they speak reasonable to little English, often not understanding what others are saying.
He is first shown when Da Mayor comes in, asking for some Miller High Life. He and his wife says that they have run out of stock, and to buy something else. The same happens when Sweet Dick Willie asks for the same beverage.
ML insults Sonny running the grocery store because he and his family are Korean.
When Radio Raheem comes in for some batteries when his batteries for his boom box runs out, Sonny and his wife have a hard time understanding him. When Radio Raheem gets impatient, Sonny says: "Motherfuck you!"
Later when the fight ensues, Sonny is seen bashing his fist onto the police car that's taking the dead Radio Raheem away. Just before the riot, he pulls his wife into the grocery store.
After the people burn down Sal's Pizzeria, they plan to do the same to Sonny's grocery store. Sonny defends his store and his family with a broom, saying that he also suffers the same prejudice blacks suffer. ML is annoyed with him, but Coconut Sid tells him to leave him alone, as he's alright. Sonny holds his hand out, hoping to shake hands with ML, but ML doesn't but leaves them alone.
"It's cheap, I got a good price for you,
Mayor KochMaeil gatchi (means 'everyday' in Korean), how-I'm-doing, chocolate egg cream drinking, bagel and lox, B'nai B'rith Jew asshole."
"I no white, I no white."
"I black! You, me, same!"
- He is portrayed by Steve Park