Marcel Bonaparte

Marcel Bonaparte, known in Japan as Martin Kanou, is a new student entering Ra Yellow in the third season.

Biography
Noteworthy for looking very pale and sickly, he is close friends with Blair Flannigan. After being transported to the Realm of the Beasts, however, Marcel is corrupted by the mysterious demon arm posessing Yubel's spirit, the mysterious demon that Professor Viper was helping. He then turns many students and faculty members into "Duel Ghouls" (Duel Zombies in the Japanese version) and plans to unleash the Sacred Beasts before declaring himself king of his newly-instituted empire.

Marcel is Bonaparte's son, raised by the man's ex-wife. He grew depressed by the sight of his parents bickering and his father leaving their home in Paris at a young age (in the English version, Marcel missed his father, and there was no divorce). It is this depression which allows Yubel to possess him. During his possession, Marcel has expressed a desire for the company of others, this being another reason why he turned students and faculty into Duel Ghouls.

During the duel with Jaden Yuki and Jesse Anderson, Marcel is set free from the creature's influence when Yubel regains physical form. After Duel Academy is restored to its proper place, Marcel recuperates, but not before being checked on by Blair while Bonaparte apologizes for making him depressed in the first place. But Marcel will never forget the pain and suffering Yubel put on him.

Marcel is seen one more time prior to Jaden's duel with Yubel, as Jaden remembers all the people Yubel has wronged.

He leaves the academy in the fourth season to spend more time with his father.

Voice/Mannerisms
Marcel speaks in a French accent in the English dub, except for when he possessed by Yubel. When he speaks without his accent, it is actually Yubel speaking through him. This incarnate of her is akin to a split personality for Marcel, as it refers to itself as "your best friend" when consoling Marcel when he thought he had no friends. Occasionally, his voice gained the same vocal effect Yubel's did, and he sometimes used her voice (at which time he glowed blue). In the original version Yubel used her own voice when she possessed Marcel more often, and Marcel's body didn't glow blue when she used her own voice.

Deck
Marcel plays an Exodia/Sacred Beasts Deck while controlling others. By using cards such as Mad Reloader and Break the Seal, he is able to quickly gather the individual pieces of Exodia and declare an automatic victory. After retrieving the Sacred Beasts, he boosts the summoning speed of the Sacred Beasts and also supports the summoning of their combined form, "Armityle the Chaos Phantom". These cards were only used when he was possessed by Yubel, so he may have owned another deck, which is unknown.