The Emblem of Roto
Dragon Quest: The Emblem of Roto is a manga which takes place 100 years after the events of Dragon Quest III and is about a descendant of Erdrick named Arus. Written by Chiaki Kawamata and Junji Koyanagi with art done by Kamui Fujiwara it ran from 1991 to 1997 and had two spinoffs, Dragon Quest: Emblem of Roto Returns, and Dragon Quest: Emblem of Roto: Those Who Inherited the Emblem.
After the defeat of Zoma two descendants of Erdrick left Alefgard and founded two kingdoms, the kingdom of Carmen, and the kingdom of Loran, each taking half of the Emblem of Erdrick. 100 years later the king of Carmen is fighting a campaign against a tribe of evil shaman while his wife the queen is pregnant. When they reach their hideout the king and his men find a demonic statue which they assume is the god the shaman worship. As the king gets close enough to destroy the statue it causes the kings necklace with his half of the Emblem of Erdrick to break off and bewitches the king. The king then decides to take the statue with them to use it as leverage against the shaman.
In the following months the king worships and talks to the demonic statue in secret. The voice of the statue which is the Dragonlord tells him to give his child the demonic name of Jagan instead of the holy name of Arus. When the queen gives birth the king tries to take the child and hold an evil ceremony to name the prince Jagan. General Volgoy and his daughter Lunafrea think that the king is a demon in disguise and try to stop him. Volgoy attacks the king who transforms into the demon Delus along with some of his guards who become skeletons and kills the queen. Lunafrea then uses a ring of light on the demon Delus and defeats him. She then takes Arus and escapes the castle and meets up with Giran and Tarkin who begin to live their life in secret so that monsters may never find the hero Arus and they can train him to become a great hero. After the Dragonlord's failure to turn Arus into a demonic lord he turns to the kingdom of Loran where another descendant of Erdrick is born and succeeds in naming him Jagan and turning him into a demonic lord. 10 years later Arus begins his journey along with Lunafrea, Tarkin, and Giran and his son Kira.