Arurukan Romalhi is a key Automaton character from the anime and manga series Karakuri Circus. Known simply as Arurukan (Arlequin in French), he is a powerful and enigmatic puppet controlled by Shirogane, one of the main protagonists. Arurukan is recognized for his harlequin-like appearance and exceptional combat abilities. Throughout the series, he protects and aids the protagonists against hostile Automatons, playing a significant role in critical battles and adding depth to the mysterious world of Karakuri Circus.