Like, a number of NuHumans had suffered something, but they generally were all able to move passed that and find meaning with their new lives, in different ways and to different extents and with many outright embracing their new positions. Even Nur/Frank McGee. Dante Petruz/Inferno is no canonical exception to this.
The only NuHuman who I can think of that would come kinda close to fitting the bill is
Jack, a NuHuman from All-New Inhumans. He was in the opening issues, and popped up again a little later. The events saw Jack transported to an Inhumans weapons cache, but the book ended before we could pick up on his subplot again. But using him would be problematic because he's kinda an antagonist/villain, who, as he was last left, wouldn't be welcome in such a forum as your script entails. And there really isn't a non-villainous NuHuman who'd fit the bill and not come off as an antagonist anyway.
I also guess there
is Synapse, who wasn't for jumping to Medusa's invitation when she gave it to her in the early part of Uncanny Avengers. Maybe that'd be the closest, but even Synapse made due with the circumstances in a way similar to Kamala. While she wouldn't go hopping to defend a Royal's corner, so to speak, she wouldn't go out of her way to antagonize them, either. Meaning, it'd be unlikely for her to be here unless someone she cared about asked her to and she decided to take them up on their offer. But again, she'd be the absolute closest without fudging canon too much. Though, you'd need to be careful to acknowledge that she's more than made a positive turn with her own situation as a hero, while also being careful not to turn her strict villain, too.
Beyond that, you'd really need to create a new NuHuman. (Or use Kamala's brother, who feels like he's in denial as it is. I dunno.)