Ryu is a central fighter in the Street Fighter series, known for his disciplined martial arts journey and his constant pursuit of stronger combat skill. In Super Street Fighter IV, "Satsui no Hadou ni Mezameta Ryu" refers to an alternate, darker version of Ryu who has awakened the murderous intent known as Satsui no Hadou. This form represents his struggle against inner darkness and serves as a powerful rival-style character, highlighting the series’ themes of self-control, temptation, and the cost of power.