North No.2 is one of the seven most powerful robots in the world and is the only one originally designed specifically for military combat. He served as a commander of British robot forces during the 39th Central Asia War, where he destroyed numerous enemy units. The brutality of that conflict left him with deep psychological scars and recurring nightmares. After the war, he retired from military service and became a butler for the blind musician Paul Duncan, living with him in an old Scottish castle that had also served as a research lab for his creator. North No.2 is a large, beetle-like robot with six mechanical arms that can change into a variety of formidable weapons, including claws, drills, and hammers. Despite his fearsome design and combat capabilities, he despises war and wishes only to live in peace. His primary motivation is to improve his skill at playing the piano and to serve his aged master with unwavering loyalty. He is gentle, introspective, and yearns to understand humanity and emotion through music. His role in the story is that of one of the first targets of the antagonistic robot Pluto. When Pluto threatens Paul Duncan, North No.2 flies out of the castle to defend him, engaging Pluto in aerial combat. He fights bravely using his many arms and weapons, but is ultimately defeated and destroyed. His death serves as an early catalyst for the larger mystery of the serial killings of the world's greatest robots. His key relationship is with Paul Duncan, whom he comes to see not merely as a master but as a disciple, after Duncan recognizes the song North No.2 learned from Duncan's own childhood memories. North No.2's development traces a path from a weapon of war to a being seeking identity, purpose, and a connection to life beyond destruction. His notable abilities include his six versatile arms, advanced combat skills, and a built-in self-destruct bomb installed as a last-resort measure.