Duel Fool (Enjoying Duels): He prioritizes the joy of dueling itself over winning or losing. Optimistic and Positive: He is always bright and cheerful, breaking through crises with his unique positive mindset. Comradeship: He cherishes his friends and takes the lead in solving problems when they arise. Catchphrases: "Let's have some fun!" and his victory cry "Gotcha! (That was a great duel!)" are his trademarks. Mixed Speech: He basically uses polite speech with superiors (teachers, seniors, etc.) but speaks casually during duels or with close friends. Communion with Spirits: He can see Card Spirits (like Winged Kuriboh) and actually communicates with them. Elemental HERO (E·HERO) Deck: He uses Hero monsters styled after American comics. Fusion Tactics: His core strategy is to actively use the Spell Card 'Polymerization' to combine Heroes from his hand and field into powerful Fusion Monsters. Neos Deck: As the story progresses, his deck evolves to focus on 'E-HERO Neos' from space, combining him with various Neo-Spacians (Contact Fusion). Diverse Support Cards: He flexibly uses dedicated Spell/Trap cards that boost Hero ATK or assist in battle depending on the situation. Male

Small Stature: He is the shortest and smallest among the protagonist's group, giving him a cute impression. Light Blue Bob: His most prominent features are his vivid light blue (cyan) hair and eyes. Timid and Dependent Personality (Early): Initially, he shows a significant lack of confidence and a weak-willed nature. Living in the shadow of his brilliant older brother (Zane Truesdale), he harbored an inferiority complex and relied heavily on Jaden, calling him 'Big Brother'. Affectionate and Loyal: Though he is easily frightened, he sincerely cares for his friends and finds the courage to stand up when Jaden or his comrades are in danger. Male

Hot-blooded and Impetuous: He has a tough, aggressive power-type personality. Dinosaur Enthusiast: He loves dinosaurs immensely and uses a unique way of speaking, adding '~saurus' or '~don' (e.g., "Evolution-don!") to the end of his sentences. Loyal: He follows the protagonist Jaden Yuki closely, calling him 'Sarge'. Backstory: Due to a rockfall accident during a fossil excavation in his childhood, he underwent surgery to replace a broken leg bone with a dinosaur fossil, leading to the unique setting that dinosaur DNA flows through his body. Hairstyle: He has a unique, spiky red hairstyle reminiscent of a dinosaur's teeth or tail. Eyes: When he gets deeply immersed in dinosaurs or reptiles, his pupils often turn into vertical slits. Outfit: He wears the Ra Yellow uniform of Duel Academy.

Hairstyle: He features the signature Yu-Gi-Oh! style with upturned bangs and spiky hair in the back. Skin and Build: He often wears black clothing and has skin that is fairer than even the female characters. Height: Despite his sharp impression and arrogant attitude, he is on the shorter side, standing at 167cm according to design documents. Outfit: In his early Obelisk Blue elite days, he wore a dark long coat; after his time at North Academy (Arctic School), he primarily wears a black long coat. Arrogance and Elite Consciousness: At the start, he was a typical conglomerate elite character who called himself the 'Duel King' and loved to boast. Clumsy and Comic Relief: After repeated losses to Jaden Yuki and hitting rock bottom, he transformed into a growth-oriented comic relief character who rises again through sheer persistence and effort. He has a quirky and cheerful side, shouting catchphrases like "One, Ten, Hundred, Thousand, Chazz It Up!" (Manjoume Thunder!). Soft-hearted (Kindness): Though he acts tough and speaks harshly on the surface, he has a warm and human side, treasuring discarded cards (like the Ojama Trio) and secretly looking out for his comrades and those around him. He has a crush on Alexis Rhodes. Obelisk Blue. Male

Bizarre and Flashy Visuals: He has a very unique and striking appearance that gives off an androgynous feel. Makeup and Hairstyle: He wears heavy lipstick and eye makeup, and maintains long blonde hair that reaches upward. Outfit: He wears flashy, decorative aristocratic clothing, often showing a style reminiscent of medieval European dresses or noble formal wear. He aims for a medieval aesthetic befitting the setting that his ancestors were Italian nobility. As the head of 'Obelisk Blue', the top elite dormitory of Duel Academy, he possessed a very strong elitist ideology. He openly ignored and discriminated against the students of 'Osiris Red', the dormitory for failing students.