Zane Truesdale (Ryo Marufuji in JP) is the top duelist of Duel Academy, being one of the few people who were able to beat Jaden in a duel, as well as the rival of Jaden Yuki in Yu-Gi-Oh! GX. Later in the anime/manga, after experiencing several losses and losing hope, he participated in an underground duel where he is then forced to change his ways and eventually becomes "Dark Zane", becoming more aggressive and unforgiving with his playstyle.
His signature card is Cyber Dragon, which is an archetype consisting of mostly light attribute monsters. Cyber Dragon shares many similarities to Blue-Eyes White Dragon, with the exception that it is not a normal monster. After his personality transformation later in the series, Zane uses a different deck. While still focusing on Cyber Dragons, they mostly consists of their darkened version.