Sungjin shares a room with Wonpil
Young K calls Sungjin a "Mosquito Head Hunter" because he is often seen killing mosquitoes.
Jae calls Sungjin "Bob" because to him he looks like "Bob the Builder"
Sungjin's favorite color is Orange.
According to the other members, Sungjin tends to do rounds before he goes to bed just to check if everyone is okay or if anyone needs anything.
For Sungjin, his greatest features are his eyes.
Sungjin is very neat and clean.
Sungjin is also a good dancer but he doesn't really show it during broadcasts.
He is close friends with JB of Got7
According to fellow member Jae, Sungjin looks like Lee Min Ho.