The Heartwood Now we're climbing higher

The good guy?
She certainly was not and she knew that, but what she'd don't was what settled her conscience and what she did was, usually, what she believed. Not what she said, much, nor what she did in her spare time, but what she did in the matter of law and rightnesses was correct; to her at least.
No one could be perfectly correct to someone else, though she knew -- knew -- Tundra would have her own regrets about her actions that she decided was right. 
They all did.

With that said, wouldn't Maegi be right to herself in leaving? Perhaps. But in Flicker's perspective, who felt the necessity to stay for Relmyna's kids, it was not. They had little knowledge of the outside world and their safety was at risk. She didn't doubt they couldn't hold their own but if they attacked someone who could easily kill them, they probably have been killed.
It was all perspective.

Tundra pushed back, her maw wide open to catch the fire-clad woman. Flicker dropped herself down, reducing her target level significantly, and threw herself forward, driving upwards, at Tundra. Her teeth sought to catch on her let or chest -- anything. Hopefully, with a little bit of luck, Tundra would be caught out by the drop to be caught.