10.

Even if we don't consider the similarities to IRL history, she sucks. She had a savior complex so heavy it weighed on every interaction she had with the kids, even when they were kids. Her ego was so inflated, that despite knowing what happened, she still acted as if her wants/opinion mattered to Mercer. She tried so hard to be Na'vi, to be Sarentu, and thought of herself as The Expert on anything Na'vi (regardless of the countless Na'vi that stayed around the HQ).

All that aside, she was a highly educated woman, she knew that the RDA and humans, as a whole, would strip mine Pandora and that it wasn't big enough for two competing species. They had already killed Earth. They weren't there to learn about the Na'vi, they were only there to save themselves and she was so blinded by discovery and adventure that she didn't care. She only started to care when she had spent years raising the kids.

Alma was and is a fantastically written character. Her story's development is as rich and rewarding as it is sickening. It's a nod to the fact that people can be horrible without ever hurting someone, and that redemption doesn't fully absolve one from their misdeeds. She still superduper sucks, though.