@ultrastrum said: “Look, I don’t want to swear but; What. The frick!” - the doctor <3 from here.
Generally speaking, Romana didn't have qualms about being a Time Lord. Yes, there were (very, very many - maybe she'd write a book about them, one day) things that she disliked about Time Lord society, but on the whole, she enjoyed having her in-depth knowledge of time travel, and regeneration was a skill that could really come in handy in a pinch.
Unfortunately, not everyone across time and space felt the same way that she did, and upon her species being identified, she found herself facing a bit of a conundrum. She didn't imagine that her specific identity would go down well with the crowd, but she didn't think that they'd be too lenient if she pretended to be just a poor civilian.
It was a long shot, but in the end, she had decided to pretend to be her old friend. She was almost surprised when it worked - in her experience, the Doctor tended to attract ire more than anything, and she had half expected to be given a death sentence on the spot.
Since then, she had been winging it, and things had kept going surprisingly well, and she was almost starting to believe that she might actually pull this off for long enough for her time ring to recharge.
Just around then, the actual Doctor had gatecrashed.
"Not so loud!" Romana said, really not wanting to be thrown into a cell for the second time today. "Look, I'm sure that we can handle all of the outrage surrounding identity theft when all immediate problems have been resolved, yes?"
And, then, because this new body of theirs was unfamiliar: "...Where are you in your timeline, anyway? I do hope we're not risking a pradox; that isn't what we need on top of the," she gestured vaguely, "everything else."