Marquis Leon Muno is the successor of Marquis Muno after the latter and his clan are wiped out by Zen (Undead King). The Leon has no blood relation to the Marquis instead his a relative of the neighboring Duke Oyugock (branch family)WN 6-6 as he succeeded the name to manage territory as baron 5 years later after the incidentWN 6-23. The Leon has an amiable personality. He is well known for his fondness of heroesWN 6-18 and his hobby is collecting books on heroes with rumors going so far to say that he specially built a theater in Muno City just to have theatricals about the hero.
A plump man with black hair and mustache.
He was with her daughter and Hauto when Satou, Arisa, Pochi, Toruma and Hayuna arrived to the room in the mansion. After Arisa released the illusion on Pochi, he said that Pochi is a lovely child. He asked permission to pat the Pochi's headWN 6-24.
By Satou's instruction he let it in the anxious citizens inside the castleWN 6-27.
Leon and the butler gave Satou lessons for socializing with high-class people the day after he received the house nameWN 6 Intermission 5.
Time after Marquis Muno
He was guided by the king to the chapel near the royal castle where the City Core is located and explained the function of the Core, after that, Steralick granted him the house name of Muno and order him to release the cursed and blocked City Core, and become the new lordWN 6 Intermission 6.
Leon along with head miko Latenion, went to exorcising the curse that the Undead King has left on the underground shrine on Muno City, so Leon could take control over the City Core, the curse was Zen's shadow, but he fainted. Leon tried three more times to take control over the Core, but he didn't succeed, only after 16 years the curse was lifted, when Satou killed ZenWN 6 Intermission 6.
- Ring (created by the City Core)WN 6 Intermission 6.
- He is a fan of the heroes.
- Satou is the direct cause of his rise from Baron to Earl and later to Marquis.
- Muno family has no prejudices about the demi-humans.