Samurai Deeper Kyo/WMG

Fubuki is Shinrei's father.
Look at the hair, people. Just look at the hair.

More seriously:
 * Poofy, silver hair that no one else has: Check.
 * Power(s) related to water: Check.

I know we "saw" Shinrei's father in flashbacks but: 1)We also saw Fubuki pretending not to be someone's father  2) We never saw that guy's face, and 3) nor were he and Fubuki ever in the same room.