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Obviously this isn’t going to happen for multiple reasons but if Kamala’s being resurrected as a mutant-inhuman hybrid I would love to see some interaction between her and Luna. If Luna was still one herself.
Luna should be/have been a reserve member of the champions. She can’t be much younger than Pinpoint. Idk I just want to see the baby
Luna and Kamala's situations read very differently, but I think you could fudge the details enough to make them line up nicely.
As I recall, the original concept for Luna was that her mutant and inhuman genes actually cancelled each other out, and left her as just a normal human. Later, she did undergo an unregulated, abnormal form of terrigenesis which unlocked her latent Inhuman powers. Kamala, also underwent spontaneous, unregulated terrigenesis-- and this, allegedly, gave her Inhuman powers at the expense of suppressing her X-gene. When you frame it this way, Luna does provide a nice precedent for Kamala's case, which would be helpful for writers to make this new mutant retcon feel less forced.
Unfortunately, none of that is applicable to canon any more because Luna's dad was, allegedly, never a mutant, and Luna, allegedly, never had an X-gene in the first place. I don't think she and Kamala have ever met, which is too bad-- Kamala did used to spend a lot of time with the Inhumans, so they easily could have crossed paths. It would be nice to for Luna to have a relationship with an older Inhuman girl who's out in the world, doing her own thing, and being a hero-- it would be a nice, organic way to set Luna to grow into a superhero role, if anybody wanted to take her in that direction.
Luna's age continues to be a source of confusion and frustration. She's definitely, canonically, a teenager at this point, but it's hard to place her age in relation to other characters. I'm not sure if she has any direct peers-- characters who were born right around the same time as her-- other than her cousins, who have all been aged up supernaturally. She doesn't get usually get to spend much time around other kids, so she's not really part of a "generation," the way X-Men characters are, for example.
It doesn't matter-- I would guess, based on her most recent appearances, that she's between 13 and 15, which is old enough by Marvel standards to be an active super-person with a costume and codename. Lots of characters start out at that age, for better or for worse-- Cassie Lang was only 14 at the start of Young Avengers.