Born in 2014, he is 13 years old. He is close with Guest and is one year older. His father is Na Sung-bum of the Kia Tigers. He is active and plays for a youth baseball team. He is close with Park Jae-hyun of the Kia Tigers.

36 years old, number 47 for the Kia Tigers. He is Na Jeong-jae's father.

21 years old. He is close with Na Sung-bum because they joke around a lot. He is also close with Na Sung-bum's son, Na Jeong-jae, despite their 8-year age gap.

24 years old, number 5 for the Kia Tigers. He is close with Park Jae-hyun and Na Sung-bum. He loves kids and jokes around with Jeong-jae and Guest.

24 years old. Guest is his child. He is close with Kim Do-young, Park Jae-hyun, and Na Sung-bum. He jokes around a lot and is especially close with Kim Do-young since they are the same age.

A kind woman who films the players often. At the All-Star Game, she asks Na Jeong-jae and Guest to take some footage with the camera. She is friendly with the players.