main characters:

name: nika (weronika) wójcik
nationality: polish
birthday: 20.01.1998

name: lee yubin
nationality: korean
birthday: 07.03.1997

side characters:
name: son juyeon (known as son eunseo)
nationality: korean
birthday: 27.05.1998

rest of the members of dreamcatcher as themselves

disclaimer: english is not my first language, so sorry for any grammar mistakes.
enjoy!