Atro Spiker  

, アトロ・スパイカー

In essence, Adlet was under the tutelage of Atro, who imparted upon him the philosophy that laughter could strengthen one's resolve. Despite his notorious reputation for inflicting grueling lessons on his pupils, save for Adlet, all others fled from him. Through Atro's teachings, he bestowed upon Adlet the knowledge necessary to become the world's strongest warrior and defeat Kyoma. Furthermore, Atro possesses expertise in both science and weapon-making.