Andersen, Johan

ヨハン・アンデルセン

In the Yu-Gi-Oh! GX anime, Johan Anderson (known as Jesse Anderson in the 4Kids dub) is among the transfer students who arrived at Duel Academy during Judai's third year. Johan represents North Academy and uses a Gem Beast deck focused on the seven Gem Beast monsters, including his spirit partner, Ruby Carbuncle. Johan quickly befriends Judai after realizing they both can communicate with monster spirits. Judai and his friends assist Johan in his quest to complete his deck by locating the ultimate Gem Beast—the Rainbow Dragon.
Johan and the other exchange students appeared in the manga at the end of chapter 37, but it is currently unknown what their role in the story will be.
In the manga, Johan shows a strong interest in insects, as seen when he first meets Judai and Sho. He also plays an Insect deck; however, he never really did anything of importance to the "plot," seemingly because the final volumes of the manga were rushed, so he wasn't fleshed out.
He is also shown in the special chapter, wearing different clothes (resembling his anime outfit), watching Koyo and Judai's final duel.