And the weird thing is even if people knew who she was, it'll still be suspicious. Hope has a whole-ass family still alive - she has at least 7 adult guardians - aunts, uncles, older brother - and a wolf pack. How Legacies managed to spin this con that Hope is an orphan with nowhere to go is beyond me. There are a lot of more suitable options to shack up with than her middle-aged widowed headmaster. Who already had an inappropriate relationship with a former female student!
You didn't finish this so I don't know if him was Kaleb or MG, but assuming the former, I have to say - after thinking about it for a while - some characters are fine remaining in the support role. Kaleb is set up to be a minimal conflict character - vampire-proud, a family that accepts him for who he is, cocksure and confident... He's a foil to MG's slightly sensitive, nerdy personality with his Triad legacy and ripper potential. And, you know what? That's fine. The Black Best Friend trope was offensive because it was a trope that always had a black stereotypical character propping a white fully-realise character, implying that the black character was "less" of a person than the white one. The trope of one character acting as support to another wasn't offensive of itself, it's the context of real-life racial inequality and stereotypes that made it offensive.
Which is my roundabout way of saying that as long as Kaleb is MG's wingman, then I don't see the problem. Considering how TVDverse tends to ruin side characters when it decides to focus on them, I'd rather Kaleb stay as MG's best friend than be "upgraded" to Hope's, for example.