The King of Kings... she's a great-grandchild of him.
Dragon Lord's Great-Grandchild,
Ryuu-chan.
Related to his quote after the final battle of the Dragon Quest II (Japanese version). ("Ryuuou" means "DragonLord" in Japanese.)
English version: "Thou hast done well, [Hero]. Let bygones be bygones and we shall be friends."
Japanese version: "From now on I'll call you plain old [Hero]-chan. You can just call me Ryuu-chan, too! Ha ha ha!"