I read the replies after posting, so I deleted that part right away.
But in my defense, the original post stated that in the story, the character is described as “black”, so I didn’t think of the possibility of the character being a mixed blood. If it’s stated, I won’t call out the author for “trolling”.
The rest of my opinion still stands, though. Even if it is justified to have a black character mixed with other ethnicities, it’s more accurate to label her as a mixed blood.