Cronos de Medici  

Kuronosu de Medichi, Vellian Crowler, クロノス・デ・メディチ

Dr. Cronos de Medici is a professor at Obelisk Blue dorm and appears in both anime and manga series. In the initial episodes, Crowler expressed dislike towards Judai because he had defeated him in entrance exams. He attempted to expel Judai but was unsuccessful every time. Eventually, Dr. Cronos de Medici came to respect Judain and felt saddened when they graduated as his class. In the English version of the anime, Dr. Cronos referred to Osiris (Slifer) Red students as "Slifer Slackers," while in the Japanese version, he called them "Drop-Out Boys." In the English version, Crowler spoke with a vague British accent and often used phrases like "Mama Mia!" and "Buongiorno," whereas in the Japanese version, he spoke in an Italian accent and frequently yelled out these phrases. His hair and clothing sometimes made him be referred to as "Miss" in the English version. In the manga series, Dr. Cronos acted similarly to how he did in the first season of the anime. Crowler played an Ancient Gear deck in both anime and manga series.