[All the fire is gone now and Ikki is also visibly more relaxed and willing to look at her. He sensed that she was really troubled about being surrounded by fire, even one that didn't harm her, but that's probably a natural reaction so he doesn't pay it too much attention.]

Your spirits sound a lot as what people in my world call Gods. In the ancient times there were also people who supposedly could contact with the superior beings and talk with them. Try to calm their anger or ask for advice, they were called Oracles.

And most of them were fake.

[He shrugs, no he's not accusing Katara's Avatar of being a fake. He's more inclined to believe it real than a fake, actually.]

Anyway, I still maintain that your people must have a strong will. Specially if you serve as any kind of representation.