Kabe no Kyojin is not a standard named individual character in Shingeki no Kyojin (Attack on Titan), but rather a phrase referring to the Wall Titan(s), colossal Titans embedded within the Walls. These Titans serve as a hidden and terrifying part of the series’ lore, tied to the history of Paradis Island and the founding of the Walls. Their role is central to the story’s mysteries, the political power of the Walls, and the catastrophic threat revealed during the series.