Loving the saturation effect going on in the video. But don't lie to yourself, 9m is all about Eunji
Here is how I see them:
-Sera is the heart and soul. She is also very sexy and a great singer, but those don't even matter compared to the identity-granting realness she brings.
-Eunji is the face. Soooooo disarmingly gorgeous and also a total superstar powerhouse of performing abilities that I'd say are good enough for solo work.
-Lee Sam isn't my type but probably second most charismatic/powerful after Eunji, definitely stands out as a shining talent.
-Kyungri/Seunga/Hyuna/Erin are the sexy, general "babe factor" girls with decent performing abilities. Since they fill out the middle space of the group they are important, and they have seriously stepped up their performing abilities from kind of crap to good, which was key to group survival.
-Hyemi has fun while performing in a cute way. Something about her comes off as a genuine cute/sweet-type girl, not model-type like the others. She has some things to learn but is an essential vocal to the group.
-By my tastes Minha is a weak link, by far the least expressive and not all that great of a vocal, but for some reason she seems to be pretty popular so I guess my tastes definitely differ from Korean audiences.