Item from Attack on Titan by Hajime Isayama
A bloodline ability granting superhuman strength, reflexes, and combat instinct — the result of Titan science applied to human subjects. Immune to memory alteration.
The Ackerman clan is what happens when you try to put Titan power into a human body and succeed. Developed through experiments by the ancient Eldian Empire, Ackermans retain human form but can access the combat experience and physical power of all previous Ackermans through the Paths — a lifetime of martial knowledge that activates in moments of extreme stress. The 'awakening' feels like a switch being thrown: suddenly the body knows how to fight, how to move, how to kill with an efficiency that borders on supernatural. Levi and Mikasa are the last known Ackermans, and watching either of them fight is like watching a different species. The power comes with immunity to the Founding Titan's memory alteration, which made the Ackerman clan a threat to every king who wanted to keep his subjects docile. The old royal government tried to exterminate them. They almost succeeded. Almost was not enough.
Also known as: Ackerman bloodline, the Ackerman power, Titan science