But she didn't have an English name and she was dressed up in a particular way... Even so white British people get asked where they're from.
So it's just projection then... it's clear she wasn't talking about citizenship so that implication is just false. Obviously, anyone of any race/ethnicity can be British. They're not necessarily indigenous British though (potentially partially if mixed race) thus the question of where her people are from or rather what her heritage was.
"projection" - *ticks bingo card
"indigenous British" - How do you define that?