Which you can read about here.  Later on I’ll copy/paste the descriptions of traits, pointing out which ones are relevant to each character (because while many of them are very close to textbook examples, none of them are entirely).
I’m a little surprised how easy this was.  And how well-distributed, across the board, they are.  Obviously many personality types were the same and one or two had me waffling between types, but overall the types jumped out and screamed a particular character at me.

Dusty: ISFJ
Snowday: INFJ
Cappuccino: ESFJ
Kouhii: INFP
Jo: ENFP
Gwendolynne: ISTJ
Bernard: INTP
Bean: ESFP
Cartwright: ENFP
Nilla: ENTP
Amaya: ISFP
KC: ENFJ
Hazel: (not sure yet)
Mariposa: ESTP
Rascal: ISTP
Valentine: ENTJ