Toya Todoroki, also known as the villain Dabi, is the eldest son of Endeavor in My Hero Academia, a major antagonist driven by a deep-seated hatred for his father. Born with a powerful fire quirk, he was subjected to intense training by Endeavor, which ultimately led to his own body being unable to handle his flames, causing severe burns and a twisted, scarred appearance. After being presumed dead, he resurfaced as the villain Dabi, joining the League of Villains to exact revenge on his family and destroy his father's legacy. Key aspects of Toya Todoroki/Dabi: Origin: He was Endeavor's firstborn son, intended to be the "perfect" successor to surpass All Might. Quirk: "Blueflame," a powerful fire quirk that is more intense than his father's, but his body is not suited for it, leading to self-immolation. Transformation: His intense training and neglect by his father broke him mentally, leading him to embrace his "death" and be reborn as the villain Dabi, with black hair to hide his identity. Motivation: His primary goal is to ruin Endeavor's life and career as a form of revenge for his abuse and abandonment, and to expose his father's hypocrisy. Affiliation: He was a member of the League of Villains and later a lieutenant in the Paranormal Liberation Front.