Crystal Saint  

, クリスタルセイント

The character you are referring to is known as Hyogas Master in the anime adaptation of the series, while in the manga version, Aquarius Camus was the master of Hyogas. In the anime, Camus served as Crystal Saints master instead. His Cloth resembles a snowflake when not being worn and he is highly regarded for his honorable and righteous nature as a Saint.