• Seto Kaiba, the rival character in the Yu-Gi-Oh! series, is widely regarded as the best part of the franchise. The article argues that Kaiba's complex character development, his dynamic relationship with the protagonist Yugi, and his iconic status among fans make him the true star of the show, overshadowing even the main character.

• Kaiba's character arc is praised for its depth and nuance, as he transitions from a ruthless, power-hungry businessman to a more nuanced and sympathetic figure who struggles with his own demons and personal growth. The article highlights how Kaiba's character evolution is a key driving force behind the series' narrative.

• The article also emphasizes Kaiba's iconic status among Yu-Gi-Oh! fans, noting his popularity as a character and the enduring appeal of his signature card, the Blue-Eyes White Dragon. It suggests that Kaiba's larger-than-life persona and his memorable moments in the series have cemented his place as the true heart and soul of the Yu-Gi-Oh! franchise.