1. m.m.d: all members are mothers 2. kard: mixed gender members 3. blackswan: first group to debut with a black member 4. pink fantasy: has a hidden member 5. k/da: members are inspired by league of legends 6. seventeen: has 3 leaders 7. eternity: members are made by deepfake 8. tep5ive: all have philippine nationality 9. lady: all are trans women 10. nct: unlimited members 11. f(x): has a tomboy member 12. enhypen: leader is 2nd youngest 13. unsn: 10 kpop stans get a chance to experience being a kpop idol might add more, hope you find this interesting...
