Which characters would be good to pair with Skirk?

https://preview.redd.it/p51801l9qisg1.png?width=1912&format=png&auto=webp&s=0cba4c8b503ed48008d77f7776c5282b3260c8e4

https://preview.redd.it/6s0jiyscqisg1.png?width=1909&format=png&auto=webp&s=6f0db694aac9b95cc6dc5788c1a6c9b0378ddab8

I've got Yelan and Escoffier on the team, but not sure about the fourth slot. Can I keep Kokomi, or should I swap her with somebody else like Rosaria or Diona?