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Supposedly the order is going to be Carlotta > Roccia > m*le > Phoebe > Zani > rerun > elf
I think this girl is supposed to be more like a mermaid, and it wouldn't be the first time I've seen them depicted with knife ears.  She also had the skrillex haircut. The redesign was a big upgrade. 

I am basing this solely on fanart, but I have seen like 10x as much of Zani as Phoebe. Or Carlotta for that matter. And I have seen 0 of Roccia.