Prince Seto Kaiba - After his parents death, Kaiba was spoiled by the castle's servants. One night, Kaiba refused to let in a beggar, but she turned out to be a powerful enchantress named Ishizu. She cursed Kaiba, and turned him into a reflection of his darkness. Embarrassed of his monstrous form, Kaiba has concealed himself in his castle. When Kisara arrives, Kaiba realizes that she could be his best hope of breaking Ishizu's spell, but what beautiful, self-respecting girl would ever love a beast like him?
Joey - He's a very well known ladies man. His girlfriend Mai is often furious with his flirtatious style. He's also very kind and caring.
Tristan - Tristan was left in charge of the household when Kaiba's father died, and he takes his job very seriously.
Yugi - While wandering into the castle grounds during Christmas, Isis adopted Yugi as Kaiba only found out a few moments before the curse was activated. When he was cursed. He's very innocent to the point of naivity and very willing to make friends.
Mai - Kaiba's maid. Mai was turned into Harpie Lady. She's Joey's girlfriend and is very flirtatious, much to Joey's annoyance.
Serenity - Joey's little sister and the dresser. She and Tristan are interested in each other, but Joey doesn't exactly like that idea.
Solomon - Kisara's step-father. Solomon's an inventor, and when he went to the fair to show off his technique of controlling Exodia, he lost his way and ended up imprisoned in Kaiba's castle. He was released when Kisara promised to take his place.
Ishizu - Isis' twin sister. When she came to visit Kaiba, she cursed him upon seeing his selfish nature, she transformed him into a dark reflection of himself until he could learn to love someone else and earn their love in return.
Pegasus - The rich, eccentric director of the local insane asylum, the Maison des Lunes. He is extremely corrupt, and he'll stop at nothing to make a few extra bucks, including throwing Solomon into the asylum.