Su is a beautiful being living on Sirius.
 
Su, in Sirian language, means seed of a flower and is used as a syllable added to many suffixes.
His father calls him Su-an which means “lotus to be”.
His mother calls him Su-jin which means “lotus seedling”.
 
So Su is the seed of lotus flower white and blue. If you plant the seed in a part of Sirius, the seed will give a white lotus. If you plant in another part it will be a bLue lotus.