ericht_samaya
The main protagonist of Gundam Suisei no Majo PROLOGUE special, she is one of the 2 daughters of Elnora Samaya, who later adopts the name Prospera Mercury in the TV anime.
In Season 2, it is revealed that the Gundam Aerial/Rebuild is either her current body or contains her consciousness.
She is voiced by Ichinose Kana.