I'd honestly picture Paprika and Pinkie becoming friends after making each other laugh and Pom and Fluttershy wanting to just talk it out followed by Fluttershy running up to Pom's dog's and petting them and saying how cute they look maybe feeding them treats followed by Pom blushing and warming up to Fluttershy. Rainbow Dash would probably want to beat Tianhou at a flying race or a series of sports. Rarity and Velvet would probably get along complimenting each other's fashion senses until one gets too Snarky. Applejack and Arizona I picture clinking a cup of cider with one another possibly watching the fireworks between Velvet and Rarity getting too catty and talking about what they do on their farms. And Twilight and Oleander just having a deep conversation about magic and what type of magic is more powerful until they get in a disagreement and put both their magic to the test.