Tangy's greeting was "Oh, your aroma", and her catchphrase was "nice smell". Aurora's greeting was "I mustn't forget". Sheldon set his house down next to the town's orange orchard and orange is his favourite colour, so his catchphrase is "oranges". It's pretty funny how he just blurts that out in every conversation.
It's not a weird thing to say, but I set Static's greeting to "umm... hello". He was always really shy and insecure in the letters he sent me, so I gave him a greeting that matches that. I think his greeting makes him even more adorable ♥