Ryu Hayabusa

Ryu was born in the House of Hayabusa which is a branch of the Dragon Clan.
Once before, Ryu was engaged in a fierce batter with Jaquio over the statues
of the evil demon, and was able to come out the victor only after a very
difficult battle. Ryu is known as the "Ninja Dragon" and he is in possession
of the secret "Dragon Sword."
When he is not fighting evil, Ryu runs a shop with Japanese antiques, together with his girlfriend Irene.

(sources: Ninja Gaiden II: The Dark Sword of Chaos instruction manual; self)