German/English Name: Mai Valentime

Age: 24

Japanese Voice Actor: Terada Haruhi

Mai is very beautiful and good Duelist, who is with her Harpyie a very dangerous enemy. She used to believe that she can not believe anyone and does not need friends. However, she changes her mind and becomes a good friend of Yuugi.

German/English Name: Maximillion Pegasus

Age: 24

Japanese Voice: Jirou J. Takasugi

Pegasus, who is the creator of Duel monsters, is the first enemy of Yami No Yuugi and the president of the "Indrustial Illusion Company". He loves cartoon and always read comic books in his free time.

German/English Name: Shadi

Age: 20

Japanese Voice: Nozomu Sasaki

Shadi is the guardian over the Sennen Items. With the Sennen Key he is able to look into the souls other people. He has also the Sennen Ankh in his posssesion and can prove if somebody say something true or false with it.

German/English Name: Rebecca Hawkinds

Age: 8

Japanese Voice: Kaori Tagami

Rebecca is a genius and the best American duelist. She is mad at Sugoroku, because she thinks, that Yuugi's grandfather has stolen the "Blue Eyes White Dragon" from her grandfather Arthur Hopkins. However, at the end she reocvers that she was wrong and apologizes to Yuugi. Since then she fell in love with him.

German/English Name: Duke Devlin

Age: 16

Japanese Voice: Ryo Naitou

Otogi was very mad at Yuugi, because he thinks that Yuugi has beat Pegasus J Crawford with cheating.
Pegasus and he wanted to publuched the Game "Dungeon Dice Monsters", which monsters came from the game Duel Monsters and in which he has worked alone very hard. However, after the Duelist Kingdom Pegasus' contact with him has broken and there was no way that he could publish his game. So, he believe that it is Yuugi's fault and tries to defeat him with his game.