The evolution of Uchiha Izumi's Sharingan could be said to have come naturally.
After years of preparation.
Her Eye Power and emotions had both reached their peak.
In the end... she opened her eyes.
This time, Hyuga Sho also watched the entire process of Uchiha Izumi opening her eyes.
Including how her brain secreted special Chakra.
Then.
It passed through the optic nerves and entered her eyes.
Prompting them to open.
And now, the awakened Eye Power sent wave after wave of feedback back into her body.
While strengthening Uchiha Izumi's body, it also raised her upper limit.
Yes.
Opening the Sharingan improved one's talent.
If a person's limit was the Genin level, then... a One Tomoe Sharingan could raise them to the Chunin level.
Uchiha Izumi had evolved from Two-Tomoe to Three-Tomoe.
That meant... she could at least reach the level of an Elite Jonin.
Of course, simply sitting around and waiting for one's strength to improve would not do.
The story of The Sorrow of Zhongyong was an example of that.
Next, she still needed to train properly.
As much as possible, she would undergo repeated hellish training, until Uchiha Izumi was trained to the point of passing out.
"Izumi... your Sharingan has evolved into the Three-Tomoe Sharingan."
"Eh~?!"
Only after Hyuga Sho reminded her did Uchiha Izumi become aware of it.
Then...
Her vision suddenly spun.
Opening the eyes consumed not only Chakra, but also mental energy.
Of course, the feedback from the Sharingan quickly helped Uchiha Izumi steady herself.
As if the dizziness she had felt just moments ago had merely been an illusion.
After activating the Three-Tomoe Sharingan, Uchiha Izumi could sense torrents of heat flowing through her body.
An unprecedented... vast amount of Chakra filled her body.
Uchiha Izumi felt that she had endless