The core secret of the Tsukiyama family lies in a specific genetic defect inherited by most of its members. This defect causes unusual and powerful transformations when triggered under certain conditions, primarily involving cannibalism within the ghoul community.
Unveiling the Tsukiyama Family's Unique Trait
Unlike other ghouls, many in the Tsukiyama lineage possess a unique physiological response to consuming ghoul meat. This isn't just a matter of strengthening their kagune; it leads to a far more profound and dangerous metamorphosis.
Here’s a breakdown of this genetic anomaly:
- Genetic Predisposition: A significant portion of the Tsukiyama family line inherits a distinct genetic flaw. This defect is a foundational element of their unique biology.
- Trigger: Ghoul Cannibalism: The defect becomes active specifically when a Tsukiyama family member consumes the flesh of other ghouls. This act of cannibalism is the critical catalyst for the transformation.
- RC Cell Corruption: Upon consuming ghoul meat, the inherited genetic defect causes their RC cells (Red Child cells) to become corrupted. RC cells are crucial for ghouls' abilities, forming their kagune and contributing to their unique physiology. This corruption signifies an abnormal and uncontrolled proliferation or alteration of these cells.
- Kakuja Transformation: The ultimate result of this RC cell corruption is the involuntary transformation into a Kakuja. A Kakuja is a rare ghoul form achieved when a ghoul repeatedly cannibalizes other ghouls, leading to an abnormal kagune that envelops their body like armor. For the Tsukiyama family, this process is an inherent, dangerous side effect of their genetic makeup, triggered specifically by ghoul consumption, rather than a purely gradual process of sustained cannibalism seen in other ghouls.
This secret explains why members like Shu Tsukiyama exhibit such extreme behaviors and transformations when exposed to ghoul meat, setting them apart even within the diverse world of ghouls. Their lineage carries not just prestige and wealth, but also a dangerous, inherent biological predisposition that can lead to formidable, yet potentially uncontrollable, power.
