Given what we know, the answer may be rather novel.

Spoiler

It's almost a guarantee that Aerial is a rebuilt Lfirth, since it was brought up super early on that Mercury wouldn't have the capital to build a Gundam and yet here's Aerial showing up out of seemingly nowhere with largely the same bag of tricks with GUND Bits. And now we have confirmation that Aerial's intelligence is Eri.

But what happened to Eri's sister, the original Lfirth AI?

Consider that the prologue lays it on super heavily that the objective of Vanadis was the development of GUND to achieve transhumanist ideals, to create a new human body for mankind that could survive the harsh rigors of space. And technology with GUND already could achieve Cyberpunk 2077/Deus Ex Human Revolution level augmentation.

We have Aerial, which is a human mind transplanted into a Gundam. But the Gundam already had a mind...so Suletta could be the reverse, the Gundam mind put into an artificial human body. But still Eri's sister.

 

Witch From Mercury Has Helped Give Gundam One of Its Best Years Ever
Guess will be expecting an Aerial statue soon.

 

Seeing the glowing shell Unit IRL would sure be pretty.

 

Happy Mother's Day!

 

She doesn’t deserved it.

 

So we're now two episodes into

Spoiler

everything and everyone Suletta ever loved abandoning her (emotionally and physically) and calling her pointless. I'm thinking it's pretty unlikely that she'll be able to bounce back and pretend like nothing is wrong next episode, unlike this past episode. On the bright side, this seems like this might become this impetus for her to ditch her mom's hairband and start acting for herself more.

 

So will Suletta use this Gundam to stop Aerial?

 

Hoooboy... it's starting to feel like Victory in here... We SURE Kill-Em-All Tomino isn't involved? 

 

I really hate this show. If is wasn't so close to the end I would drop it.

 

Yeah I've fallen behind I think three eps now. I wouldn't say I hate it but it's not grabbing me anymore.

Why do you hate it? Why not just drop it anyway?

 

I really do not like the story line much. Too many people with a story line. It gets convoluted. I am fan of Gundam shows with Gundams. Also Suletta just gets on my nerves. I rarely drop anything, I tend to finish shows.

 

Norea is too unstable to stay alive.