u/Frostie3473

Eren Yeager is a man who would sacrifice the entire world for a glimpse of freedom. In the JJK universe, he represents the peak of unhinged willpower. But how do we fit a 15-meter giant into a Cursed Technique?

The Grade: Special Grade. But is he a Sorcerer, or a Cursed Spirit born from the Fear of Invasion/Oppression?

The Transformation: Does he use Body Transformation (like Mahito) to become the Titan, or is the Titan a Shikigami that he pilots from the nape?

The Founding Power: How would his ability to influence Paths work? Is it a soul-based resonance or a memory manipulation technique?

The Binding Vow: In AoT, he has to draw blood to transform. How does that translate to a JJK Binding Vow to boost his Cursed Energy?

I think Eren's CT should be Titan Shell. He manifests a massive body of Cursed Energy around himself. To keep it balanced, maybe he can only manifest parts of it (like a ribcage or an arm) unless he uses his Maximum Technique. His Domain Expansion would be The Coordinate—a void where he has total control over the biology of anyone trapped inside.

What do you think? Would Eren side with Geto’s ideology, or would he be a lone wolf that even the higher-ups couldn't execute?

Alucard is an unstoppable force of nature. If he were dropped into the JJK universe, he wouldn't just be a Cursed Spirit, he’d be a candidate for the throne currently held by Sukuna.

The Origin: Is he an Incarnated Sorcerer from the Heian era, or a Vengeful Cursed Spirit born from the collective fear of the night?

The CT: We already have Blood Manipulation (Kamo Clan). Let’s aim for something unique. Is his power based on Shadows, Soul Collection, or Binding Vows regarding his Life Stockpile?

The Release States: How do his Restraint Levels work? Are they specific Binding Vows that limit his Cursed Energy output until certain conditions are met?

Domain Expansion: What does Level 0 look like? A barrier-less domain that manifests his thousands of souls?

I think his CT should be Occult Consumption. Instead of just drinking blood, he absorbs the Cursed Energy and Information of anyone he kills. These souls are stored in his shadow as Shikigami. He can't use his full power unless he releases his Cromwell Restrictions—a series of self-imposed Binding Vows that hide his true Grade.

We all know Vergil is known for his speed and spatial slicing. But how do we make his kit work within the laws of Cursed Energy without just making him another Gojo?

Grade: Special Grade (obviously).
The Weapon: He uses Yamato. Is the sword a Cursed Tool that stores his technique, or is the sword made of Cursed Energy?
Doppelgänger: Is this a Shikigami or a unique application of his CT?
Domain Expansion: What is the "Sure-Hit" of a Judgement Cut End?

I think his CT should involve Spatial Anchors. He marks a spot in the air, and any slash he performs instantly travels to that anchor.