It's funny (in a not so funny but "oh god the parallels" way) that both Claudia and Callum, human mages, virtually pawns of Aaravos, have a staff from a previous important elven person of great power (whether they were royalty or a mage).
But for Claudia, she stole it. Or rather her dad technically stole it. But still. Claudia technically shouldn't have it. Nor is she willing to let it go.
Whereas Callum was allowed to have it (though I don't remember if Ibis actually said he could have it like Callum claims or not. Even if he didn't actually though, it's still implied) after the previous mage that owned his died. And he is willing to let it go if he must (using it as a gift of sacrifice to Rex Igneous)
But regardless of how they got their staffs, it feels kind of deliberate that both the human mages being led down a dark path by Aaravos have a very powerful elven staff that the eye is often drawn to while watching them on screen.