Piper Perri Surrounded - Gawr Gura Surrounded

I hope she's as good swimming in boings as she is in the water.
[She needs floaties]
I'll miss her.

They're both from the same company, and debuted in the same "batch"(the first generation of their EN branch, composed of five members). They've stayed pretty solid friends and imo seem like they're best friends with each other out of the gen.
So it's less how often they collab and more how well they bounce off of each other whenever they DO collab(which also gives people ship fuel but… meh…)