de Medici, Cronos

クロノス・デ・メディチ

Dr. Cronos de Medici serves as the professor of the Obelisk Blue dormitory. He appears in both the anime and the manga. During the first season, Crowler expressed a dislike for Judai because Jaden had beaten him in the entrance exams; consequently, he attempted to expel Judai, but failed every time.
Eventually, Cronos de Medici comes to respect Judai and becomes sad in the fourth season upon discovering that they are part of the graduating class.
In the English version of the anime, Cronos refers to Osiris (Slifer) Red students as "Slifer Slackers," whereas in the Japanese version, he calls them "Drop-Out Boys." Additionally, in the English version, Crowler speaks with a vague British accent, while in the Japanese version, he speaks with an Italian accent, often yelling phrases such as "Mama Mia!" and "Buongiorno."
His hair and clothing have sometimes led to him being called "Miss" in the English version.
In the manga, Cronos behaves in the same manner as he did in the first season of the anime.
Crowler plays an "Ancient Gear" deck.