Yuki can NOT affect souls let this be the standard

Okay so I've seen many people say this and I'm tired of it

The common argument is that she has soul perception The argument is she was able to hear the souls of past star plasma vessels The fact that she's a star plasma vessel herself And the fact that she wrote a book on souls

At most this would give her basic soul perception and she'd be able to fight with SSK but I'm far fetched on even this and I'll explain why But that's the most she'd be able to do

She can't injure mahito by attacking his soul like Yuji

She can't affect incarnated sorcerers She can't heal soul damage to herself

Okay so let's start

The first picture shows that Gojo is able to see the soul in the exact same way mahito does

Yet he cannot affect the soul in the same way Yuji does in his fight against Sukuna

Nor do they give him SSK to attack sukunas soul directly So either Gojo didn't wanna kill sukuna Or he opted out of using SSK for what ever reason Or he just cannot wield it So Yuki being able to use it is unlikely

Mind you gojo clearly has the best soul perception in the series up there with Mahito because he can distinctly see the soul

But seeing another's soul DOES NOT MATTER

You can hear other people's souls You can see them You can do what ever None of that gives you the ability to affect them

Yuji and Sukuna have the ability specificly Because they can see the shape of THEIR OWN SOUL And so far other than a special case like Mahito who's CT is based on the soul

That's the only way to become aware of the outline of your own soul

The second image shows that Sukuna wasn't aware of it until he Shared a body with Yuji

Mind you this is sukuna the guy that split his own soul into 20 fingers

And he wasn't aware of the outline of his soul until he shared a body with Yuji

The soul book only helped Yuji because he already had the ability to affect other people's souls

All it did was help him refine the ability to target the barrier between a incarnated sorcerers soul and the host

If the book allowed someone to affect souls All the heavy hitters would've read it before the Sukuna show down