Why Does Tokyo Ghoul's Ken Kaneki Crack His Fingers?
Kaneki cracks his fingers because he picked up the habit from the ghoul Yamori (Jason), who tortured him. It's a sign of his trauma and a badass intimidation tactic!
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It's a nod to his transformation and the psychological scars from his time with Yamori. Plus, it looks super cool and creepy.
Kaneki does it because it shows he's absorbed some of Yamori's traits and it's symbolic of his inner turmoil.
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