완득이

Dong-joo's Father

Classmate

Wan-deuk's Mother

Waiter

Wan-deuk's Father

Nam Min-gu

Jeong Yun-ha

Hyeok-Ju

Market Man

Do Wan-deuk

Coach

Lee Ho-jeong

Director of Students

Young Wan-deuk

Police

Incheon Coach

Lee Dong-joo

Annoyed Neighbor