Jaden Yuki

Jaden Yuki (Judai Yuki in the Japanese version) is the main protagonist of Yu-Gi-Oh! GX.

He's a cheerful, carefree, and extremely optimistic high school student who attends Duel Academy. Jaden is a passionate and naturally gifted duelist who lives for the thrill of dueling rather than fame or power. He starts the series as a Slifer Red student (the lowest dorm) despite his exceptional skill, mainly because he slept through most of his entrance exam.

Key traits:

• Extremely laid-back and fun-loving personality
• Calls almost everyone "bro" or by friendly nicknames
• Believes dueling should be enjoyable above all else
• Has a strong connection to Elemental HERO cards
• Very loyal to his friends
• Surprisingly perceptive in battles despite his goofy demeanor

His catchphrase in the English dub is usually some variation of "Get your game on!" and he frequently talks about having "the best deck ever" (his Elemental HERO fusions).

Overall, Jaden is one of the most lighthearted and positive main protagonists in the Yu-Gi-Oh! franchise.