Dai Ichi no Kyozou, known as the First Colossus, is the very first colossus encountered by the protagonist Wander in the game 'Wander to Kyozou' (Shadow of the Colossus). Towering and humanoid, it stands as an introduction to the mechanics and awe-inspiring scale of the colossi. Serving as the initial test for Wander, this colossus teaches players about climbing, weak points, and strategy. Its defeat marks the beginning of Wander's harrowing journey to resurrect Mono, setting the emotional tone for the series.