I'll , wait for it.
She will never be on that given her haki level.
She cannot copy haki ,
Even she thinks Haki like Luffy but she don't how to use haki like luffy.
She turned into nika but she doesn't how to be nika in the first place.
She is young broken because her imagination goes hard right now.
Elder she becomes she will be weaker instead of stronger.
A kids imagination is stronger when they are young not when they are older.
She just became nika. She isn't nika and doesn't know how nika does things.
Hypothetically let's say I become Superman Because I want to as a 12 year old. How tf do I know how superman works , all I know is bro fly and hit. And there would be so many complications only superman would controlling these powers.
Also I'm pretty sure this is just one attack thing.
They hit mars and he regenerate nothing new is gonna happen.
Set yourself up for disappointment.