The more I look at Asami's background and resources, the more I realise that she could be the Avatar-verse's version of Tony Stark.
Her father's betrayal and madness tore the world from under her but also provided her with the tools she needed to restore the family's name and honour. She would no longer be the glamorous daughter of the inventor, she would become an inventor herself. She would show the world what a non-bender could do if they focussed their mind and efforts. She would clothe herself with armour and soar alongside her friends in the defence of their cities.
She would become the mother of the art of machine-bending.
I liked the previous two for the complexity of background which didn't overwhelm the characters though. Here the background seems a bit too simple (not too say bland), and the character doesn't really stand out. It might be because it's too dark, or because the both the background and the foreground share the same colour palette. I like the way it's designed, but it's kind of melting together, if that even makes sense...
It is bland, I'm honestly not sure what to add that stays with the gear idea I wanted for her. I think it might be too dark, I was struggling with the color. I think I'll play with it more later, after taking a break and see what I can do. Like a half hour of completing it, I went back and added a lot more shading to her eyes and face. I didn't think of it until after I took a break.