Dragon Warrior Monsters
As a young child, Mileyu was taken by Warabou to the kingdom of GreatLog. A few moments later, Watabou appeared and took Terry to the kingdom of GreatTree. Terry only wanted to find his sister, but the king of GreatTree, convinced him to become a monster tamer and win the Starry Night Tournament. The king stated that if Terry were to win the tournament, he would be granted any wish he desired. Terry set off to recruit monsters and win the Tournament. After Terry's monsters become powerful enough, he enters the tournament, fighting against the monsters of the champion from GreatLog, who happens to be his sister Mileyu. After winning the tournament, Terry and his sister are reunited.
Dragon Quest VI
Terry is a talented swordsman, traveling the world to find more powerful weapons and to prove his strength. He is first met by the hero in the town of Arkbolt setting out to defeat the hacksaurus terrorizing the cave north of town. Terry is able to reach the monster first and defeat it in battle. Later, he is met in the Everfrost Grotto where the Sword of Ramias is found. Terry decides to leave the sword for the hero though, since it is all rusty. Finally Terry must be defeated in battle before the Cloudsgate Citadel can reappear in the Dream World. Once Dhuran, the boss imprisoning Cloudsgate Citadel is defeated, Terry will join the hero's party.
Terry initially goes on his quest to become more powerful, because he was unable to protect his older sister Milly while growing up in Felonia. She was taken away when they were younger which prompted Terry to pursue his quest. Somewhere along the way, he lost sight of his true goal, and doesn't even recognize Milly as a member of the hero's party. Once Terry is defeated, he and Milly are reunited and reconcile.