An Hungarian princess and a companion of Florete, the daughter of Emperor Filimenis.
When Filimenis went to war with Arthur, Blanchandine and Florete accompanied the emperor’s army. They fell in love with Gawaine and Floriant, respectively, and defected from Filimenis’s camp to Arthur’s.
Eventually, the war ended and Blanchandine married Gawaine.
Source
Floriant et Florete | c. 1250-1275