Sid Barrett is a three-star meister partner to Mira Naigus, instructor of Death Weapon Meister Academy, and a high-ranking member of the DWMA Central Intelligence Agency. Though killed in action by Shaula Gorgon, he is later resurrected as a zombie by Franken Stein. Before his death, Sid was known to be a friendly and well-respected teacher, having earned admiration and respect from not only the students he taught, whether they were in the EAT or NOT class, but even the likes of the staff such as Death and his weapon partner, Mira Naigus. While Sid was somewhat strict in his teachings as matter of fact, he deeply cared for all his students. He was also merciful and loved children even at the young age of 13, having been the one to not only spare Black☆Star's life but accept him as his son. He also was an individual who never hesitated in helping a student and inspiring them to unleash their latent potential. He also described himself as a stubborn individual. Even when he resurfaced as a Zombie, he still retained all his previous traits. In addition, Sid carries himself as a professional and follows orders to the letter. Sid is also known for describing and critiquing himself, often saying "That's the kind of man I was".