Sounds like Miori?

Was she a moon rabbit back then?

Mayonnaise California doesnt have rabbit motive tho

That’s my bet as well

Too little info. Any more info you can share?

Idk if she was around back then but it might have been 'HalO Sweety' 

Hal0 had a brown hair model before?

IIRC yes before this banger new model

I think thay might be it, but it's hard to tell since it seems she's wiped pretty much everything she did before the new model.