Chou-ougata Kyojin, known in English as the Colossal Titan, is a pivotal figure in the anime series Shingeki no Kyojin (Attack on Titan). Characterized by its immense size and ability to emit steam, this Titan is responsible for breaching Wall Maria, setting the main events of the story into motion. Initially shrouded in mystery, the Colossal Titan's true identity is revealed as Bertolt Hoover, making it a central antagonist whose actions drive much of the series’ conflict and intrigue.