Katara would never want to be Fire Lady, she would never want to lead the nation that killed her mother.
Idk, the girl staged a prison break, committed ecoterrorism, and demolished cultural misogyny. Getting the nation responsible for her mother's death under her thumb sounds exactly like her MO.
Interesting thing: Eddie doesn't have the ability to move silently, but he was somehow miraculously able to put a plastic eye in Mr Sweet's cup. And when Patricia scattered the powder, Mr Sweet was already halfway there to sip from the cup. How did he not notice the floating eye? Because the second time, he noticed and got scared.