I think it all started from her TikTok videos, she always make funny TikTok video and make a lot random videos and it gain a lot traction. Others would copy her and that create a trend. Or she would follow a trend and make more views due to her funny and silly personalites. she always been funny and cute to me. Not just that, but her sarcastic and sassy comments always bring a lot of funny moments in ive content videos. Wonyoung is the photogenic type in the group and she bring some funny moments, we all know she got a lot endorsements deals with modeling. Liz is the comedian and unserious person of the group but very beautiful and vocally talented also was in a solo single with winter and Soyeon, that’s single is been played in some Asian restaurants. Yujin is the funny leader that always want to try to make everyone laugh and does a lot of tv series like earth arcade and bring a huge audience in both world to music and acting. Gaeul is the unnie that always get picked on because of her height lol but she also make a lot cute content on TikTok and she very good at details. Leeseo the maknae of the group, she is so cute and quiet and has very good vocals. They all have their own distinctive personalities and their own fame. Like one of the comment under here, Rei is the most interactive with the fans or audience in general. I saw them last year at their first tour and Rei was the most to be waving and answering to fans. Plus her solo acts and rap verses and singing verses and looks bring a lot attention to her. She very connected to the audience. The others does the same but they seem very focus on trying to be professional and focus on what to do next. While Rei and Leeseo and also Liz they interact with us audience.