In German she would called a "Rampensau" (limleight hog) She just loves to perform, needs the audience like a human needs air to breath and always seeks to be the center of attention Present a mic or a camera and you can be sure that Kaaya will be upfront :-) That makes her incredibly entertaining If she's always that popular with the other girls I dunno. Lol
Her stinging comments and eternal rivalry with other members is entertaining to watch. I think I'm more impress with their manager for just sitting and watch the younger girls duke it out though I pity the older members a bit for not engaging too much in variety videos.
Looking forward to the younger girls growth and see how they changed from here.