I don't get how Yeonwoo still hasn't caught on on how similar Ji9star voice is to Jigu.......

Voices can sound different over the phone and I don't think he's that interested in finding out who ji9star is

yeah he mentioned he doesnt want to mix real life with the game friends

I think that is because of the way of talking. Ji9star is rather active and outward while he is talking to mc and he is also very expressive in game whereas jigu is an introvert kind that speaks loudly while accusing and causing trouble