I'm writing my next fanon episode and I'm not sure about something. I don't know if I should include it or not becuase I don't know if it's possible in the Avatar World.
The Moon and Ocean spirits, Tui and La, decided to manifest themselves in the physical world as Koi fish. That means that they were fish in the spirit world or not? Can spirits choose an animal or something else to manifest themselves in the real world, and could a spirit like Koh, for example, manifest himslef as a human?