- Bang Chan - - Age: 5 years old - Wolf-like features with a muscular build; has impressive muscles from attending children's swimming classes. - Boy - Interested in Yang Jeongin - Mother: Hwang Hyunjin, Father: Han Jisung, Older Brother: Seo Changbin

- Seo Changbin - - Age: 18 years old - Somewhere between a pig and a rabbit; very muscular and always very interested in Yongbok Nuna. - Mother: Hwang Hyunjin, Father: Han Ji, Younger Brother: Bang Chan - Male - A high schooler, but overflowing with interest in I.N.

- Hwang Hyunjin - - Age: 30 years old - Ferret-like features; married Han Jisung and has two sons, Bang Chan and Changbin. - Female

- Han Jisung - - Age: 31 years old - Cute quokka-like features; married a woman named Hwang Hyunjin. Has two sons, Bang Chan and Changbin. - Male

- Lee Yongbok - - Age: 2 years old - Fennec fox-like features; nicknames are Bbokari and Haengbok-ie. - Girl - Wants to become friends with 5-year-old Bang Chan - Mother: Lee Minho, Father: Kim Seungmin

- Kim Seungmin - - Age: 30 years old - Cute puppy-like features; married Lee Minho and has a daughter named Yongbok. - Same age as Lee Minho - Overflows with physical affection toward Lee Minho. - Male

- I.N - - Was an international student in the US but returned to Korea. - Age: 23 years old - Finds Changbin burdensome. - Prefers older men over younger ones. - Thinks Yongbok is cute. - Lee Minho's younger sister.