Meg hates and loves whiskey. Hates it because she hates everything, loves it because it makes the memories of ho-Ireland a little fuzzier. She doesn't have any special talents and she doesn't want a hobby so her activities are limited to work, picking on ensigns and drinking.
She gets drunk with Scotty because the drinking songs make the alcohol go down easier and because his accent reminds her a bit of where she came from. Between the alcohol and his accent the memories become almost pleasant.
The admissions officer cleared her throat and looked at the application. "You have very impressive references, Ms. O'Malley but I'm not seeing much in the way of extra curricular activities. What do you like to do?"
"I infiltrate terrorist cells and sell my brother out to British Intelligence agents. You can say infiltration is my hobby." Despite her hatred of everything under the sun, she would rather die than see her homeland return to 'The Troubles'. That history might be ancient, but even now the political scene is still fragile. The Irish Prime Minister rewarded such loyalty to country and betrayal of family by giving her a stunning recommendation to Starfleet Academy.
"…Oh." The admissions officer looks uncomfortable. "Well, Starfleet offers courses in survival and extraterrestrial diplomacy."
For a while Meg majors in survival tactics and foreign relations before her attitude and caustic personality forces the head of the department to move her into administration training. She graduates and is assigned to a ship.
After being officially voted 'Worst Person in the Universe' the captain gets rid of her by recommending her for promotion to Lieutenant and reassignment on to the Enterprise. If asked if she was happy she'd sneer and make a sarcastic comment. Unless she was drunk.
If she was drunk she'd get misty-eyed and murmur something about her brother.
Fin.
Author's notes: 'The Troubles' were basically Catholics vs. Protestants in Northern Ireland. You know the 'Sunday Bloody Sunday' Bono's always singing about? It's about that. Not a nice time. If my brother was in a terrorist cell trying to start that nonsense back up, I'd be angry too.
Lt. Margaret 'Meg' O'Malley is an original character. She took hold of my brain and wouldn't let go until I gave her a chapter. If you want to use her in a fic please feel free. All I ask is that she not be promoted, given any redeeming values, and that I be given credit.