Yubel, a monster card that Jaden owned when he was still young, appeares in the third season of Yu-Gi-Oh! GX as the main antagonist. It exists as a real Yu-Gi-Oh card as well. She's the guardian of Jaden's Ancestor, and Jaden is the reincarnation of his ancestor so she protected him as well. Until she was exposed to the Light of Destruction in outer space which drives her to insanity.
Yubel uses Yubel as his/her signature card. Fiend/Plant deck against Jaden in the anime. In the anime, Samsara Lotus is used as a cost to get Yubel to stay on the field.