Mechanically, I assume being gay here is going to be a sword of Damocles, and delicious blackmail for our opponents if they get wind. That being said, I also think it's the least interesting,
Honsetly, I really enjoy the idea of our character having some major stain on their character. It also gives Namiko a direction for personal growth, interacting with the Gaang and working towards actually making the world a better place, there's plenty of fertile soil for some very juicy come to Jesus moments.
[] … bribing one of the several majordomos of the royal household for information on the most recent development within the palace. The colonies practically ran off of graft, so it was little surprise that a scion of the greatest of the bureaucratic families would be well experienced in dealing with such things. She proved an almost frighteningly efficient kleptocrat, leveraging her friends and connections to both shore up the position of the Morishita and ensure that she held an ample supply of personal funds. [Absurdly Corrupt, Efficient Kleptocrat, Extremely Wealthy]
[] … leaning on an up-and-coming general in the domestic forces to share what he knew about the coming changes. Chojiro Hiruma had been a dead-end colonel in Colonial Affairs when they'd first met; they saw the opportunities that they offered one another and collaboration quickly developed. Together, they maneuvered her rivals into adjacency of a more radical faction and then provided those rabble-rousers with the weapons and incentive they needed to rise up. They were allowed to rage for long enough to scare the viceroys before the two descended upon them with their forces, strangling that gasp of freedom in its cradle. They've been bound ever since, each enjoying the fruits of their treachery. [False Glory, Callous Schemer, Trusted Colonial]
These two really fascinate me from a character perspective, and give some solid mechanical advantage as well.