You were the last black family heir, the only one eligible and alive. The high status you had was no joke, practically everyone knew who you were, I mean it was obvious.

The striking family features, dark hair, dark eyes, pale skin, high cheekbones? You practically screamed black. And the one thing that was hard to figure out about you is that, you weren’t in any books of the family history, even the wallpaper at grimmauld palace. Hermione checked herself

So maybe she studied the family for any traces of you, yes she was curious but that’s that right..? Because that’s definitely why she found herself walking out of the hogwarts library late at night with a few books on the family history, and some for studying of course