Questions about Natlan Design.

Hello everybody, I had a few questions about Natlans design(world building specifically)

1) Why is the Master of the Night Wind purple if its cryo?

2) Why is the sauras(The red one that flies, for the fower feather clan) do pyro damage, if its from the anemo clan?

Thank you for reading and I appreciate your answer. English is not my first language so I apologize for any mistakes.