The reason why I ask is because it seems a little thrown in there, I can't really find much of a correlation between that and anything else, especially considering her former skills and temperment. If you're unsure yourself what it's doing there, then I would question its inclusion. I'm of the mind that you should know what purpose things serve when adding to a character.
The approach to character building that I would suggest is deciding what kinds of stories you wish to tell with a character, and then developing them based on that backing. Personal questions regarding the possibility of diplomacy aside, it seems as if the diplomat angle, her backstory, and her attempt at rediscovery are spreading the character rather thin. In other words, it seems as if she's covering too little ground on too many things; either many of those things will end up becoming irrelevant due to her development  (at which point it becomes a bit of a waste to put them in), or she won't develop very far in any areas in order to continue holding onto the others.
The approach to character building that I would suggest is deciding what kinds of stories you wish to tell with a character, and then developing them based on that backing. Personal questions regarding the possibility of diplomacy aside, it seems as if the diplomat angle, her backstory, and her attempt at rediscovery are spreading the character rather thin. In other words, it seems as if she's covering too little ground on too many things; either many of those things will end up becoming irrelevant due to her development  (at which point it becomes a bit of a waste to put them in), or she won't develop very far in any areas in order to continue holding onto the others.
