This will take a little explaining, and a pretty big insight into my headcanon.
The story goes that Forest Ranger Harper died saving Brave Bow and others from a wildfire, and therefore Brave Bow decided to raise the ranger's now-orphaned son. That's all well and good, but it always seemed a bit fishy to me that he was just able to get custody of a random child like that
especially a white child, holy shit, even if no biological family was willing/able to take him in.
At some point, it occurred to me that at no point have we ever heard anything of a mother. And at some other point, while looking up something completely unrelated, I stumbled across a little thing called the Indian Child Welfare Act, which says that Native nations have precedence over placement of children who belong to their tribes.
And before I knew it, I suddenly fell in love with the idea that Roy actually had Navajo lineage via his unseen (presumably dead) mother, which then gave Brave Bow an actual legal claim to take him in. (And then eventually, as Brave Bow knew he was dying, perhaps he agreed to let Oliver Queen take Roy in because the kid wasn't being much treated as one of the tribe despite his best efforts, but was old enough not to lose that part of his culture while potentially exploring the other side... but that's another story.)
All that said, meet Nascha! Half-Navajo, ace athlete, environmental science grad student, and at the time of this picture, impatiently expectant mother.
...I haven't figured out her ultimate fate yet, exactly.