3Jin (HeeJin, HyunJin, and YeoJin) is the friendship between HeeJin, HyunJin, and YeoJin.



  • They were all born in South Korea.
  • They all have brown eyes.
  • All of them go by their real names instead of stage names.
  • HeeJin, HyunJin, and YeoJin's characters in the LOONAVERSE all live on earth
  • They all are in the young LOONA
  • They all bleached their hair.
  • They were all in the Ssireum team in September 2019 edition of ISAC.[1]
  • They all are in LOONA 1/3 [1]


  • HeeJin and HyunJin are '00 Liners, but YeoJin is a '02 Liner.
  • HyunJin's and YeoJin's zodiac sign is Scorpio, while HeeJin's is Libra.
  • YeoJin's representative animal is the only one that's not a mammal.
  • YeoJin is the only member to debut in 2017.
  • HeeJin's blood type is A, HyunJin's is AB, and YeoJin's is B.
  • YeoJin is the only one to not release her solo album in the same month as her birthday.
  • HeeJin and HyunJin were trainees together at Polaris, but YeoJin was not.
  • Heejin is a lead vocalist of the group while YeoJin and HyunJin aren't.
  • HeeJin and HyunJin can play the piano. YeoJin had to give up because her fingers are too short and her hands are too small.
  • HeeJin and YeoJin have deep speaking voices, HyunJin doesn't.


  • They are in the group LOONA.
  • They all dorm together with HaSeul, ViVi, and the ODD EYE CIRCLE members.
  • With JinSoul, they make 4Jin.
  • 3Jin is sometimes used to refer to HeeJin, HyunJin, and RyuJin of ITZY, whom HeeJin and HyunJin befriended while contestants on MIXNINE.


See also[]

Check out the gallery of 3Jin !